View source for Battle of Labuan

{{short description|1945 engagement in Borneo}}
{{featured article}}

{{Infobox military conflict
| conflict    = Battle of Labuan
| width       =
| partof      = the [[Battle of North Borneo]], [[World War II]]
| image       = [[File:2-43rd Battalion soldier at Labuan airstrip on 10 June 1945.jpg|300px|alt=Black and white photo of a man who is wearing a military uniform and armed with a gun crouching on a step incline.|An infantryman from the Australian 2/43rd Battalion in a bomber dispersal bay at Labuan airstrip on 10 June 1945.]]
| caption     = An infantryman from the Australian 2/43rd Battalion in a bomber dispersal bay at Labuan airstrip on 10 June 1945
| date        = 10–21 June 1945
| place       = [[Crown Colony of Labuan|Labuan]], [[Straits Settlements]]<br/><small>(modern-day [[Malaysia]])</small>
| coordinates =
| map_type    =
| map_relief  =
| latitude    =
| longitude   =
| map_size    =
| map_marksize =
| map_caption =
| map_label   =
| territory   =
| result      = Allied victory 
| status      =
| combatants_header =
| combatant1  = {{flag|Australia}}<br>{{flag|United States|1912}}<br>{{flag|United Kingdom}}
| combatant2  = {{flagcountry|Empire of Japan}}
| combatant3  =
| commander1  = {{flagicon|Australia}} [[Selwyn Porter]]
| commander2  = {{flagicon|Empire of Japan}} Shichiro Okuyama
| commander3  =
| units1      = {{flagicon|Australia}} [[24th Brigade (Australia)|24th Brigade]]
| units2      = {{flagicon|Empire of Japan}} 371st Infantry Battalion
| units3      =
| strength1   = One [[brigade group]]
| strength2   = {{circa}} 550
| strength3   =
| casualties1 = 34 killed<br>93 wounded
| casualties2 = 389 killed, 11 captured
| casualties3 =
| notes       =
}}
{{Campaignbox Borneo Campaign (1945)}}
The '''Battle of Labuan''' was an engagement fought between [[Allies of World War II|Allied]] and [[Empire of Japan|Imperial Japanese]] forces on the island of [[Crown Colony of Labuan|Labuan]] off Borneo during June 1945. It formed part of the Australian [[Battle of North Borneo|invasion of North Borneo]], and was initiated by the Allied forces as part of a plan to capture the [[Brunei Bay]] area and develop it into a base to support future offensives.

Following several weeks of air attacks and a short naval bombardment, soldiers of the Australian [[24th Brigade (Australia)|24th Brigade]] were landed on Labuan from American and Australian ships on 10 June. The Australians quickly captured the island's harbour and main airfield. The greatly outnumbered Japanese garrison was mainly concentrated in a fortified position in the interior of Labuan, and offered little resistance to the landing. The initial Australian attempts to penetrate the Japanese position in the days after the invasion were not successful, and the area was subjected to a heavy bombardment. A Japanese raiding force also attempted to attack Allied positions on 21 June, but was defeated. Later that day, Australian forces assaulted the Japanese position. In the following days, Australian patrols killed or captured the remaining Japanese troops on the island. A total of 389 Japanese personnel were killed on Labuan and 11 were captured. Australian casualties included 34 killed.

After securing the island, the Allied forces developed Labuan into a significant base. The 24th Brigade left from the island to capture the eastern shore of Brunei Bay in late June, and the island's airfield was repaired and expanded to host [[Royal Australian Air Force]] units. While occupying Labuan, the Allies had to reconstruct the island's infrastructure and provide assistance to thousands of civilians who had been rendered homeless by the pre-invasion bombardment. Following the war, a major [[Commonwealth War Graves Commission]] cemetery was established on Labuan.

==Background==
[[File:Borneo Campaign CMH.jpg|thumb|upright=1.15|alt=Map of Borneo showing progress of campaigns in mid-1945|Map showing the Borneo campaign of mid-1945. Labuan is off the north-west coast of Borneo.]]
Labuan is a small island in the mouth of [[Brunei Bay]] with an area of {{convert|35|sqmi}}. Before the [[Pacific War]], it formed part of the British-administered [[Straits Settlements]] and had a population of 8,960.{{sfn|Rottman|2002|p=205}} The island had a town, [[Victoria, Labuan|Victoria]], on its south coast which fronted onto Victoria Harbour, with a population of 8,500 and limited port facilities. Aside from a {{convert|1500|yd|m|adj=on}} beach just to the east of Victoria, the coast was ringed by coral.{{sfn|Long|1963|p=453}}

On 3 January 1942, [[Empire of Japan|Japanese]] forces captured Labuan unopposed during the [[Battle of Borneo (1941–42)|Battle of Borneo]].{{sfn|Rottman|2002|p = 206}} The Japanese developed two airfields ([[Labuan Airport|Labuan]] and [[Timbalai Airfield|Timbalai]]) on the island, which were built by labourers who had been conscripted from the [[Lawas]] and [[Terusan]] regions of mainland Borneo.{{sfn|Gin|1999|pp=47–48}} The island population was also subjected to [[Japanese occupation of British Borneo|harsh occupation policies]].{{sfn|Long|1963|p=453}}{{sfn|Rottman|2002|p=258}} After Japanese forces suppressed [[Jesselton Revolt|a revolt at the town of Jesselton]] in late 1943, which was led by Chinese-ethnic civilians, 131 of the rebels were held on Labuan. Only nine rebels survived to be liberated by Australian forces in 1944.{{sfn|Gin|1999|p=56}} Until mid-1944, few Japanese combat units were stationed in Borneo.{{sfn|Long|1963|p=470}}

In March 1945 the Australian Army's [[I Corps (Australia)|I Corps]], whose main combat elements were the veteran [[7th Division (Australia)|7th]] and [[9th Division (Australia)|9th Divisions]], was assigned responsibility for liberating [[Borneo]]. Planning for the offensive was undertaken over the following weeks. While invading the Brunei Bay area did not form part of the initial iteration of the plans, it was added in early April after a proposed landing on [[Java]] was cancelled.{{sfn|Long|1963|pp=49–50}} The main purpose of attacking Brunei Bay was to secure it as a base for the [[British Pacific Fleet]] (BPF), and gain control of oil fields and rubber plantations in the area.{{sfn|Coulthard-Clark|2001|p=252}}{{sfn|Long|1963|p=50}} Labuan was to be developed as an airbase and form part of a string of strategic positions which would allow the [[Allies of World War II|Allies]] to control the seas off the Japanese-occupied coast between [[Singapore]] and [[Shanghai]].{{sfn|Odgers|1968|p=466}}

While the liberation of the Brunei area had been authorised by the United States [[Joint Chiefs of Staff]], it was not supported by the British [[Chiefs of Staff Committee]]. The British leadership did not want the BPF to be diverted from the main theatre of operations off Japan and preferred to establish a base for the fleet in the [[Philippines in World War II|Philippines]]. In response to a suggestion from the Joint Chiefs of Staff that Brunei Bay could support future operations in south-east Asia, the Chiefs of Staff Committee judged that it would take too long to establish facilities there, especially as Singapore might have been recaptured by the time they were complete.{{sfn|Long|1963|pp=50–51}}

==Preparations==

===Allied planning===
The plans for the invasion of Borneo evolved considerably during April. Initially, the offensive was to commence on 23 April with the landing of a brigade from the [[6th Division (Australia)|6th Division]] on the island of Tarakan, off the east coast of Borneo. The 9th Division would then assault [[Balikpapan]] followed by [[Banjarmasin]] in south-east Borneo. These positions would be used to support the invasion of Java by the remainder of I Corps. After the attack on Java was cancelled, it was decided to employ two brigades of the 7th Division at Brunei Bay, and I Corps conducted further preparations on this basis. However, on 17 April General [[Douglas MacArthur|Douglas MacArthur's]] General Headquarters (to which I Corps reported) swapped the roles of the 7th and 9th Divisions. Accordingly, the final plan for the attack against Borneo specified that one of the 9th Division's brigades would [[Battle of Tarakan (1945)|land on Tarakan island]] on 29 April (later postponed to 1 May), with the remainder of the division to invade the Brunei Bay area on 23 May. The 7th Division was scheduled to  [[Battle of Balikpapan (1945)|assault Balikpapan]] on 1 July.{{sfn|Long|1963|pp=49–50}} The Borneo campaign was designated the "Oboe" phase of the Allied offensive through the southern Philippines towards the [[Dutch East Indies|Netherlands East Indies]], and the landings at Tarakan, Brunei Bay and Balikpapan were designated Operations Oboe One, Six and Two respectively.{{sfn|Waters|1995|p=42}}
[[File:N borneo ops 1945.jpg|thumb|upright=1.15|alt=Map of the Brunei Bay area marked with coloured arrows and dates showing the movements of the main units involved in the Battle of North Borneo, including those described in this article|left|A map showing the movements of the main Australian infantry units in North Borneo during June and July 1945. Labuan is the island at the tip of the blue arrow.]]

The 9th Division began to move from Australia to the island of [[Morotai]] in the Netherlands East Indies, where the Borneo campaign would be staged, in March 1945. The division had seen extensive combat in North Africa and New Guinea, and its officers and enlisted men were well trained for amphibious operations and jungle warfare.{{sfn|Long|1963|p=457}} However, the 9th Division had been out of action since early 1944, leading to poor morale among its combat units.{{sfn|Converse|2011|p=189}} A large number of support, logistics and [[Royal Australian Air Force]] (RAAF) units were assigned to the division for the operations at Brunei Bay, taking its strength to over 29,000 personnel (including 1,097 in United States and British units).{{sfn|Long|1963|p=458}}

Final preparations for the landings in the Brunei Bay area took place in May 1945. After shortages of shipping delayed I Corps' movement from Australia to Morotai, General Headquarters agreed on 8 May to reschedule the operation from 23 May to 10 June.{{sfn|Long|1963|pp=457–458}} The 9th Division's staff completed their plans for operations in the Brunei Bay area on 16 May.{{sfn|Long|1963|p=457}} The [[24th Brigade (Australia)|24th Brigade Group]] was assigned responsibility for capturing Labuan, and the [[20th Brigade (Australia)|20th Brigade Group]] was tasked with securing Brunei and Muara Island. Both brigades were to land simultaneously on the morning of 10 June. The invasion of the Brunei Bay region was to be preceded by attacks on Japanese bases and transport infrastructure across western and northern Borneo by United States and Australian air units, as well as three days of [[minesweeping]] operations in the bay itself.{{sfn|Long|1963|pp=458–459}}

The 24th Brigade Group was commanded by Brigadier [[Selwyn Porter]]. His main combat units for operations on Labuan were the [[2/28th Battalion (Australia)|2/28th]] and [[2/43rd Battalion (Australia)|2/43rd Battalions]], the [[2/11th Commando Squadron (Australia)|2/11th Commando Squadron]] and the [[2/12th Field Regiment (Australia)|2/12th Field Regiment]]. In addition, a squadron from the [[2/9th Armoured Regiment (Australia)|2/9th Armoured Regiment]] (equipped with [[Matilda II]] tanks), a company of the [[2/2nd Machine Gun Battalion (Australia)|2/2nd Machine Gun Battalion]] and a range of engineer, signals and logistics units formed part of the brigade group.{{sfn|Long|1963|p=459}} A party of 13 officers from the British Borneo Civil Affairs Unit (BBCAU) was also attached to the 24th Brigade and were tasked with restoring the colonial government on the island and distributing supplies to its civilian population.{{sfn|Long|1963|p=496}} The 24th Brigade's third infantry battalion, the [[2/32nd Battalion (Australia)|2/32nd Battalion]], was assigned to the 9th Division's reserve force.<ref>{{cite web|title=2/32nd Battalion|url=http://www.awm.gov.au/units/unit_11283.asp|publisher=Australian War Memorial|access-date=4 January 2015}}</ref> Porter and the 2/28th Battalion's commander, Lieutenant Colonel Hugh Norman, had a difficult relationship which generated ill-feeling between the two men and their respective headquarters. Porter considered relieving Norman of command before the landing on Labuan in the belief that he was exhausted and not capable of effectively leading his battalion, but decided against doing so after Norman made an emotional appeal to remain in his position.{{sfn|Pratten|2009|p=249}}
[[File:Map of southern Labuan marked with estimated Japanese positions and Allied invasion beaches as of April 1945.jpg|thumb |upright=1.2|alt=Colour map of southern Labuan marked with some of the locations mentioned in the article|An Allied map of southern Labuan marked with the invasion beaches and estimates of Japanese positions as at April 1945]]

The plans for the capture of Labuan specified that the 24th Brigade Group's two infantry battalions were to land simultaneously on the beach near Victoria (designated Brown Beach) at 9:15 am, with the 2/28th Battalion coming ashore on the western side of the beach and the 2/43rd to the east.{{sfn|Long|1963|p=459}} The 2/11th Commando Squadron was to be initially held in reserve on board the invasion fleet.{{sfn|Long|1963|p=466}} The brigade group's objectives were to secure a beachhead, capture the main airfield (located north of Victoria and designated "No. 1 Strip" by the Australians), destroy the Japanese garrison, and prepare for further operations on the eastern shore of Brunei Bay.{{sfn|Long|1963|p=459}} Priority was given to rapidly opening the port and airfield so that they could be used to support other operations.{{sfn|Long|1963|p=465}}

Porter expected that fighting for the main objectives would begin soon after the landing, and decided to begin landing his artillery and heavy mortars with the assault waves of infantrymen, just before the tanks came ashore. The 2/28th Battalion was initially assigned responsibility for securing Victoria and Flagstaff Hill to its north, while the 2/43rd Battalion was tasked with capturing the airfield. Once these areas were in Australian hands, the 2/28th Battalion would secure the western part of the island while the 2/11th Commando Squadron captured the western shore of Victoria Harbour.{{sfn|Long|1963|pp=465–466}} Due to the Australian Army's manpower shortages, all elements of the 9th Division were under orders to minimise their casualties during the Borneo Campaign and unit commanders would rely heavily upon the available air and artillery support during operations.{{sfn|Converse|2011|p=219}} The Australians estimated that the Japanese garrison on Labuan comprised 650 personnel, made up of 400 airfield troops, 100 naval troops and 150 other lines-of-communications personnel.{{sfn|24th Brigade|1945|p=13}}

===Japanese preparations===
As the Allies advanced towards Borneo, additional units were dispatched from Japan during the second half of 1944 and the [[Thirty-Seventh Army (Japan)|37th Army]] was established in September to coordinate the island's defence. In December 1944, Japanese staff officers deduced that it was likely that Australian troops would be landed at strategic points on the east and west coasts of Borneo in about March the next year (by which time they also expected United States forces to have liberated the Philippines). Accordingly, several Japanese units stationed in north-east Borneo were ordered to march to the western side of Borneo. This movement proceeded slowly, owing to the distances involved and disruptions caused by Allied air attacks.{{sfn|Long|1963|pp=470–471}}

By June 1945 around 550 Japanese military personnel were stationed on Labuan.{{sfn|Long|1963|pp=471}} The main unit on the island was the 371st Independent Infantry Battalion (almost in its entirety, save for one company located elsewhere) with a strength of around 350.{{sfn|24th Brigade|1945|p=14}} This battalion formed part of the [[56th Independent Mixed Brigade]], which had arrived at [[Tawau|Tawao]] in north-east Borneo from Japan in July 1944 with six infantry battalions. During early 1945 the brigade headquarters, 371st Independent Infantry Battalion and three other battalions marched across the island to assume responsibility for defending the Brunei Bay area. Many of the 56th Independent Mixed Brigade's soldiers fell sick during the march, and all four combat battalions were considerably below their authorised strength by the time they arrived at Brunei Bay.{{sfn|Dredge|1998|pp=574–575}}{{sfn|Long|1963|pp=470, 495}} In June 1945 the 371st Independent Infantry Battalion was commanded by Captain Shichiro Okuyama.{{sfn|Dredge|1998|p=581}} A detachment of about 50 men from the 111th Airfield Battalion was also on Labuan, along with around 150 men assigned to other small units.{{sfn|24th Brigade|1945|p=14}} In line with Japanese doctrine, the Labuan garrison did not make preparations to contest the Allied landing force as it came ashore. Instead, it constructed defensive positions inland from the island's beaches.{{sfn|Coombes|2001|p=202}} Documents captured by Australian soldiers during the fighting on Labuan indicated that Okuyama had instructions to attempt to withdraw his force from the island if the battle went against him.{{sfn|24th Brigade|1945|p=14}}

==Battle==

===Pre-invasion operations===
[[File:American Support Craft (AWM 108818).jpg|thumb|right|alt=The situation prior to the Australian landings in Labuan.|[[Landing craft|Support craft]] moving towards [[Victoria, Labuan|Victoria]] and Brown Beach to assist the 24th Brigade's landing on Labuan]]
Australian and United States air units began their pre-invasion attacks on north Borneo in late May. The first attack on the Brunei Bay area took place on 3 May, and included a raid targeting the town of Victoria on Labuan.{{sfn|Odgers|1968|p=468}} A large number of further attacks were conducted to suppress Japanese airfields and other facilities throughout north-western and north-eastern Borneo.{{sfn|Waters|1995|pp=46–47}} The plans for the invasion of Brunei Bay had specified that the landings would be supported by aircraft based at Tarakan, but delays in rebuilding the airfield there rendered this impossible and reduced the scale of the pre-invasion bombardment.{{sfn|Odgers|1968|p=469}}

[[United States Navy]] minesweepers commenced operations in Brunei Bay on 7 June, and a flotilla of four [[Cruiser (warship)|cruisers]] and seven [[destroyer]]s (including an Australian light cruiser and destroyer) served as a [[covering force]]. The minesweeping operation was successful, though {{USS|Salute|AM-294|6}} struck a mine on 8 June and sank with the loss of four lives. Underwater demolition teams investigated all of the landing beaches on 9 June searching for obstacles which could impede the landing craft.{{sfn|Morison|2002|p=264}} The teams assigned to clear obstacles off Labuan were endangered by an unauthorised attack on the island conducted by a force of American [[Consolidated B-24 Liberator|B-24 Liberator]] heavy bombers.{{sfn|Odgers|1968|p=469}} Following the landings on 10 June, American [[Thirteenth Air Force]] aircraft flying from a base on  [[Palawan (island)|Palawan Island]] in the Philippines provided [[close air support]] for the forces on Labuan until RAAF units based on the island were ready to take over.{{sfn|Odgers|1968|p=472}}

[[File:Remnants of Victoria town in Labuan on 10 June 1945 following the Allied bombardment.jpg|thumb|left|alt=Black and white photo looking across a narrow body of water towards a town in which all of its buildings have been reduced to rubble.|The remnants of Victoria after it was attacked by Allied aircraft and warships]]
The Australian [[Services Reconnaissance Department]] (SRD) also collected intelligence on Labuan and other parts of the Brunei Bay area during May. On the first of the month several RAAF [[Consolidated PBY Catalina|PBY Catalina]] aircraft carrying SRD personnel overflew Labuan. These aircraft later landed near two native [[Proa|prahu]] and questioned their crews; two sailors were flown back to an Allied base for further questioning. On 15 May two Malays working for the SRD were landed in Brunei Bay by a Catalina, and sailed to Labuan on board a prahu. These agents recruited a local civilian from Labuan, and the party was extracted by a Catalina near the mainland village of [[Sindumin|Kampong Mengalong]] on 19 May. The intelligence gained from these operations provided the Australians with a good understanding of Labuan's geography and infrastructure. In addition, civilians who had been recruited by the SRD's SEMUT 2 team (which had been parachuted into Borneo during April) provided intelligence on the size and movements of Labuan's garrison force.{{sfn|Gin|2002}}

During the last days of May the 9th Division embarked at Morotai onto the ships which would transport it to Brunei Bay, and undertook rehearsals for the landing. Due to a shortage of shipping, the available vessels were heavily loaded and many soldiers were forced to endure cramped and hot conditions during the ten days before the landing. Australian official historian [[Gavin Long]] later wrote that for many troops these conditions "were as uncomfortable as any of the experiences that followed" during the campaign.{{sfn|Long|1963|p=461}} The 24th Brigade Group was carried by a variety of landing ships: the two large Australian [[landing ship infantry|LSIs]] {{HMAS|Manoora|F48|6}} and {{HMAS|Westralia|F95|2}}, as well the [[attack cargo ship]] {{USS|Titania|AKA-13|6}}, [[landing ship dock|LSD]] {{USS|Carter Hall|LSD-3|6}}, ten [[Landing Ship, Tank|LSTs]], five [[landing Craft Infantry|LCIs]] and seven [[Landing Ship Medium|LSMs]] from the United States Navy. A total of 38 small [[LCVP (United States)|LCVPs]] and 26 [[Landing Craft Mechanized|LCMs]] were also assigned to land the brigade once it arrived off Labuan.{{sfn|24th Brigade|1945|p=16}}{{sfn|Gill|1968|p=640}} Due to the coral reefs surrounding the island, the assault waves landed in [[Landing Vehicle Tracked|LVTs]] of the US Army's 727th Amphibious Tractor Battalion.{{sfn|Long|1963|p=459}} The convoy carrying the 9th Division left Morotai on 4 June and arrived in Brunei Bay before dawn on 10 June.{{sfn|Long|1963|pp=461–462}} The main body of the convoy anchored off Labuan, and the remainder proceeded to the Brunei area. A Japanese aircraft dropped a bomb near two of the transport ships off Labuan at 6:51 am, but caused no damage.{{sfn|Gill|1968|p=640}}

===Landing===
[[File:2-43 Battalion soldiers on board a LVT during the Labuan landing on 10 June 1945.jpg|thumb|alt=Black and white photo showing men in military uniforms wearing helmets in a very crowded vehicle. The men are pushed up against a large machine gun, and another machine gun is visible at the front of the vehicle pointing at the sky.|Soldiers from the 2/43rd Battalion on board a LVT during the landing at Labuan on 10 June]]
The landing of the assault troops at Labuan went well. The Allied fleet began bombarding the landing area from 8:15 am, and seven Australian B-24 Liberators dropped anti-personnel bombs in the area behind the intended beachhead.{{sfn|Gill|1968|p=641}}{{sfn|Odgers|1968|p=470}} No Japanese forces opposed the two battalions' assault forces as they came ashore in LVTs, and the landing of later waves of infantry and tanks went smoothly. The 2/43rd Battalion rapidly advanced north and captured No. 1 Strip in the evening of 10 June. Some Japanese soldiers attempted to defend the airfield area, and the 2/43rd Battalion claimed to have killed 23 Japanese for the loss of four Australians wounded.{{sfn|Long|1963|p=467}}

A company from the 2/28th Battalion captured Victoria shortly after coming ashore, and the battalion first met opposition at Flagstaff Hill at 10:45 am. One of the battalion's companies subsequently captured the hill, while its other companies continued to advance. The 2/28th Battalion encountered increasing opposition as the day progressed, particularly to the west of its area of responsibility. During the afternoon of 10 June the battalion engaged Japanese troops in the area west of Flagstaff Hill (at the junction of Callaghan and MacArthur Roads), with the infantrymen being supported by tanks and mortars; the Australians counted 18 Japanese dead by the end of the day, and suffered several fatalities and men wounded in this fighting.{{sfn|Long|1963|pp=467–468}} After civilians reported that no Japanese were stationed on the Hamilton peninsula which formed the western side of Victoria Harbour, a troop from the 2/11th Commando Squadron was landed in the area during 10 June and secured it without opposition.{{sfn|Long|1963|p=468}}

During the afternoon of 10 June a group of senior officers, including General Douglas MacArthur, his air commander General [[George Kenney]], and Australians Lieutenant General [[Leslie Morshead]] and Air Vice Marshal [[William Bostock]] (head of [[RAAF Command]]), made an inspection tour of the Labuan beachhead.{{sfn|Long|1963|p=467}}{{sfn|Morison|2002|p=265}} MacArthur insisted on seeing Australian soldiers in action, and the party visited a group of infantrymen from the 2/43rd Battalion before departing. The Australians had just killed two Japanese soldiers and fighting was still taking place in the area when MacArthur and the other senior officers arrived.{{sfn|Coombes|2001|p=203}}{{sfn|Johnston|2018|p=369}} The process of unloading supplies from the invasion fleet during 10 June proceeded quickly, and the ships began to depart for Morotai during the afternoon of 11 June.{{sfn|Gill|1968|p=642}}
[[File:Australian soldiers civilians Labuan.jpg|thumb|left|alt=Black and white photo of three men wearing military uniforms and carrying guns with three elderly men and a teenager wearing civilian clothes|Australian soldiers with four civilians on Labuan]]

The 24th Brigade's goal for 11 June was to secure the airfield area. The 2/43rd Battalion patrolled to the north and west of the airfield during the day, meeting only light opposition. In contrast, the 2/28th Battalion (which was tasked with advancing into Labuan's interior) encountered entrenched Japanese forces, and it became clear that it was facing the main body of the island's garrison. Norman manoeuvred his companies to push the Japanese back, but the rate of advance was slow.{{sfn|Long|1963|p=468}} The airfield engineers of [[No. 62 Wing RAAF]] were also landed during 11 June to begin work on returning No. 1 Strip to service; reconstruction of the airfield began the next day.{{sfn|Odgers|1968|p=471}}{{sfn|Wilson|1998|pp=87–88}}

On the basis of the fighting on 11 June, Porter judged that the Japanese were withdrawing into a stronghold position located to the north of Victoria and about {{convert|1|km|mi}} to the west of the airfield.{{sfn|Coulthard-Clark|2001|p=252}}{{sfn|Long|1963|p=468}} On 12 June he directed the two battalions to patrol around the stronghold area. The 2/43rd Battalion patrolled the interior of Labuan to the west of No. 1 Strip, but located only a single Japanese position. This position was attacked and destroyed that day by the 2/43rd Battalion's C Company supported by three tanks.{{sfn|Long|1963|p=469}} The 2/28th Battalion sent patrols towards the stronghold area, with a company supported by a tank troop meeting heavy resistance as it pushed westwards along a track towards MacArthur Road.{{sfn|Long|1963|pp=469–470}} The 2/11th Commando Squadron also advanced north, and linked up with elements of the 2/43rd Battalion near the centre of Labuan during the late afternoon.{{sfn|Johnston|2002|p=232}} The 371st Independent Infantry Battalion's main radio was destroyed during an air attack on 12 June, cutting the unit off from the 37th Army's headquarters.{{sfn|Dredge|1998|p=580}} As a result of the patrolling, by the end of 12 June the location of the Japanese position was fairly well known to the Australian force. The 24th Brigade's casualties to this point in the battle were 18 killed and 42 wounded, and the Australians believed that at least 110 Japanese had been killed.{{sfn|Long|1963|p=470}} The 2/32nd Battalion was also landed on Labuan during 12 June, but remained in divisional reserve.{{sfn|Long|1963|p=472}}

On 13 and 14 June the 24th Brigade Group continued operations aimed at forcing the Japanese garrison into the stronghold—dubbed "the Pocket" by the Australians. The 2/43rd Battalion secured the emergency airstrip at Timbalai on Labuan's west coast on 13 June, and elements of the 2/28th Battalion continued to push west into the Pocket along MacArthur Road.{{sfn|Long|1963|p=470}} A company from the 2/28th Battalion made another attack into the Pocket the next day after the 2/12th Field Regiment had fired 250 rounds into the area, but was forced to withdraw after being unable to overcome heavy resistance.{{sfn|Long|1963|p=472}} By the conclusion of 14 June the Australians judged that, aside from the Pocket, the island was now secure. Porter assessed that an attack on this position would need to be made in strength using well-coordinated forces.{{sfn|Long|1963|p=470}} This task was largely assigned to the 2/28th Battalion, with the 2/43rd being used to patrol the island.{{sfn|Johnston|2018|p=373}}

Following the landing the BBCAU detachment and 24th Brigade were faced with a significant humanitarian challenge. The Allied air and naval attacks had destroyed almost all of the buildings on Labuan, rendering large numbers of civilians homeless. Within days of the invasion, about 3,000 civilians were housed in a compound within the beachhead. The BBCAU party were unable to assist so many civilians, and the 24th Brigade needed to assign soldiers to support them and transport supplies.{{sfn|Long|1963|p=496}} Local civilians who had worked for the pre-war British colonial government joined the new administration.{{sfn|Donnison|1956|p=181}}

===Destruction of the Japanese garrison===
[[File:Fighting on Labuan 10-21 June 1945.jpg|thumb|alt=Map of Labuan marked with localities referred to in the article, and the movements of military units as described in the article|A map showing the movements of the Australian battalions and Japanese positions on Labuan between 10 and 21 June 1945]]
The Japanese stronghold position was about {{convert|1200|yd|m}} long from north to south, and {{convert|600|yd|m}} wide. The terrain within this area comprised a series of small jungle-covered ridges, and the position was bordered on the western and southern sides by swamps.{{sfn|Long|1963|p=470}} The main terrain features within the Pocket were three areas of high ground named Lushington Ridge, Norman Ridge and Lyon Ridge by the Australians. There were only two feasible routes into the area. The first was a track which led south into the position along Lyon Ridge and Norman Ridge; this was passable by tanks but heavily mined. The other route was a track which ran into the eastern side of the Pocket from MacArthur Road along Lushington Ridge and joined the other track at Norman Ridge.{{sfn|Long|1963|pp=472–473}} It is likely that around 250 Japanese personnel were initially stationed within the Pocket.{{sfn|Long|1963|p=475}}

In order to minimise the casualties to his brigade, Porter decided to isolate the Pocket with two infantry companies while a [[Artillery|heavy artillery]] barrage was fired into the area over several days. An attempt to capture the Pocket would only be made once it was judged that the Japanese were no longer capable of resisting effectively.{{sfn|24th Brigade|1945|pp=34–35}} As part of this plan, the 2/12th Field Regiment eventually fired 140 tons of shells into the Pocket between 15 and 20 June.{{sfn|Long|1963|p=473}}
[[File:2-43rd Battalion Bren Gun position on Labuan 13 June 1945.jpg|thumb|left|alt=Black and white photo of a man wearing military uniform armed with a large gun lying down and aiming the weapon into dense bushland. Two other men in military uniform are crouched on either side of the prone man.|A 2/43rd Battalion [[Bren light machine gun|Bren gun]] position]]

The 2/28th Battalion probed into the Pocket on 16 June. The previous day a 2/11th Commando Squadron patrol had reported that the track along Lyon Ridge would be passable by tanks if a bomb crater was filled, and on the morning of the 16th A Company from the 2/28th Battalion accompanied by a troop of three tanks and a bulldozer began to move south along it. After the bulldozer filled the crater, the force continued along Lyon Ridge but became pinned down by heavy fire from Japanese troops on Eastman Spur to the south-east of the ridge. One of the Australian tanks was damaged. A subsequent attempt by a section from the 2/11th Commando Squadron to advance towards Eastman Spur to the east of A Company was also beaten back, with two Australians killed and another wounded. A Company resumed its advance during the afternoon, supported by a new troop of tanks. The three tanks moved ahead of the infantry, and killed eight or ten Japanese personnel, but one was damaged by a bomb and another became bogged. By the end of the day, A Company had suffered five men killed and 23 wounded.{{sfn|Long|1963|p=473}} Overall, 150 patients were admitted by the 24th Brigade's attached medical units during 16 June, which stretched their capacity.{{sfn|Walker|1957|p=384}}

Due to the losses his brigade suffered on 16 June, Porter decided to continue the bombardment before undertaking further attacks. On 18 and 19 June the bombardment of the Pocket was intensified when the heavy cruiser [[HMS Shropshire|HMAS ''Shropshire'']] fired into the area.{{sfn|Long|1963|p=473}}{{sfn|Gill|1968|p=643}} Infantrymen supported by tanks conducted another probe into the Pocket on 19 June, and killed 10 Japanese; three Australians were wounded. On 20 June the 2/12th Field Regiment fired a particularly heavy bombardment and six Allied bombers attacked the Pocket. Porter judged that this would be sufficient to suppress the Japanese defenders, and ordered that the Pocket be attacked by two companies from the 2/28th Battalion supported by tanks (including "Frog" [[flamethrower]] variants of the Matilda II) the next day.{{sfn|Long|1963|p=474}}
[[File:Australian infantry signalling position on Labuan in June 1945.jpg|thumb|alt=Black and white photo of six men wearing military uniform. The man in the centre of the photograph is sitting on the ground wearing a radio headset, and four of the other men are sitting or crouching|An Australian infantry company's signalling position on 26 June]]

In the early hours of 21 June a force of about 50 Japanese troops slipped out of the Pocket and attempted to attack Australian positions on Labuan. Different groups of Japanese troops attacked a prisoner of war enclosure, dock facilities and No. 1 Strip, but all were defeated by Australian and American logistics personnel and engineers. A total of 32 Japanese personnel were killed around Victoria, and another 11 were killed at the airfield. Three Americans and two Australians were killed in these engagements.{{sfn|Long|1963|p=474}}

The Japanese attack did not delay the Australian assault on the Pocket. At 10 am on 21 June, C Company of the 2/28th Battalion began to advance to the west along Lushington Ridge, and D Company moved south from Eastman Spur. D Company was supported by a troop of three conventional Matilda tanks and two Frog flamethrowers. C Company advanced about half of the way into the Pocket before being halted by Norman who was concerned that they might be accidentally attacked by D Company, which was also making good progress. The force built around D Company subsequently completed the occupation of the Pocket, with the flamethrower tanks playing a key role. The Japanese soldiers who had survived the artillery bombardment offered little resistance to the Australian forces. The 24th Brigade assessed that 60 Japanese personnel were killed in the final assault on the Pocket, with 117 being killed by the artillery bombardment which had preceded it.{{sfn|Long|1963|pp=474–475}}{{sfn|24th Brigade|1945|p=36}}

From 21 June, the [[2/12th Commando Squadron (Australia)|2/12th Commando Squadron]] conducted patrols of the outlying areas of Labuan to clear them of any Japanese forces; up to this point the squadron had formed part of the 9th Division's reserve. Each troop of the squadron was assigned a different sector of Labuan, and by mid-July had completed its task. During these patrols the squadron killed 27 Japanese soldiers, mainly as part of repelling a raid on the BBCAU compound on 24 June, and captured a single prisoner.{{sfn|Long|1963|p=472}}<ref name="AWM 2-12 CDO">{{cite web|title=2/12th Cavalry Commando Squadron|url=https://www.awm.gov.au/units/unit_10608second_world_war.asp|publisher=Australian War Memorial|access-date=5 January 2015}}</ref> A British soldier, three local police and two civilians were killed in the raid on the BBCAU compound.{{sfn|Donnison|1956|p=181}} The 2/12th Commando Squadron was subsequently directed to undertake topographic work in order to improve the quality of maps of the island.<ref name="AWM 2-12 CDO" /> The 24th Brigade's total combat casualties in its operations on Labuan were 34 killed and 93 wounded. The Australian soldiers counted 389 Japanese dead and took 11 prisoners.{{sfn|Long|1963|p=475}}

==Aftermath==
[[File:No. 1 Squadron RAAF Mosquito (AWM OG3190).jpg|thumb|alt=Black and white photo of a group of men conducting maintenance on a twin-engined propeller aircraft while it's on the ground. Ladders and scaffolding have been set up around the aircraft.|A [[No. 1 Squadron RAAF|No. 1 Squadron]] [[de Havilland Mosquito|Mosquito]] aircraft being maintained at Labuan in August 1945]]
The process of bringing No. 1 Strip back into service went well. Nos [[No. 4 Airfield Construction Squadron RAAF|4]] and [[No. 5 Airfield Construction Squadron RAAF|5 Airfield Construction Squadron]]s were assigned the task.{{sfn|Wilson|1998|p=86}} A {{convert|4000|by|100|ft|round=5|adj=on}} unsurfaced temporary runway was constructed at a 5° angle to the existing strip.{{sfn|Casey|1951|pp=381–383}} The first RAAF aircraft, two [[Curtiss P-40 Warhawk|P-40 Kittyhawks]] from [[No. 76 Squadron RAAF|No. 76 Squadron]], landed on the strip on 17 June, and commenced operations from this base the next day. [[No. 457 Squadron RAAF|No. 457 Squadron]], which was equipped with [[Supermarine Spitfire|Spitfires]], arrived on 18 June though two of its aircraft crashed on the still-unfinished runway and had to be written off. The units based at the airfield took over responsibility for providing air support for the Army units on Labuan that day, and flew their first close air support sorties over the island on 19 June.{{sfn|Odgers|1968|p=472}} [[No. 86 Wing RAAF|No. 86 Wing's]] two flying squadrons—[[No. 1 Squadron RAAF|No. 1]] and [[No. 93 Squadron RAAF|No. 93]]—also arrived on Labuan in late July, but conducted few operations from this base before the end of the war. The wing had originally been scheduled to move to Labuan in late June, but it took longer than expected to extend No. 1 Strip's runway to the length needed by No. 1 Squadron's [[de Havilland Mosquito|Mosquito]] light bombers.{{sfn|Odgers|1968|p=474}}

To reconstruct No. 1's existing runway as an all-weather strip, the bomb craters had to have the water pumped out of them and then be filled in. [[Sandstone]] from a quarry on northern Labuan was placed over the clay and sand subbase, and the runway was topped with crushed coral from the west coast of the island, and sealed with bitumen. The {{convert|5000|ft|m|adj=on}} runway had 70 hardstandings for aircraft. With 70 also on the dry weather strip, the air base could accommodate 140 aircraft.{{sfn|Casey|1951|pp=381–383}} The 9th Division's engineers also undertook a wide range of construction projects on Labuan. These included building {{convert|356000|sqft}} of storage, new port facilities, bridges and oil tanks as well as surfacing {{convert|29|mi|km}} of roads.{{sfn|Long|1963|p=497}}{{sfn|Casey|1951|pp=381–383}} A wharf for [[Liberty ship]]s was begun on 18 June, allowing the first ship to berth on 10 July. A fuel jetty was in operation by 20 June, and a fuel tank farm with seven {{convert|2300|USbbl|adj=on}} tanks was completed on 12 July, as was a 600-bed hospital. Work then began on a 1,200-bed general hospital.{{sfn|Casey|1951|pp=381–383}} The 2/4th and 2/6th Australian General Hospitals were transferred from Morotai to Labuan during July, though the later unit's hospital facilities were not completed until 17 September.{{sfn|Walker|1957|p=386}}
[[File:Labuan WWII-Memorial.jpg|thumb|alt=Colour photo of a cemetery comprising rows of small stone grave markers. A cross-shaped monument and a red brick structure are visible in the background|Part of the Labuan War Cemetery in 2011|left]]

Once Labuan was secured, the 24th Brigade was ordered to capture the eastern shore of Brunei Bay. On 16 June, the 2/32nd Battalion was transported from Labuan to Padas Bay. The battalion captured the town of [[Weston, Sabah|Weston]] the next day.{{sfn|Coulthard-Clark|2001|p=252}}{{sfn|Long|1963|p=475}} The remainder of the 24th Brigade was transported across the bay during the last weeks of June, and the force advanced inland to capture the town of [[Beaufort, Malaysia|Beaufort]] which was defended by between 800 and 1,000 Japanese personnel. Following [[Battle of Beaufort (1945)|some heavy fighting]], the town was secured on 28 June.{{sfn|Coulthard-Clark|2001|p=252}} The brigade then advanced further inland to [[Papar, Malaysia|Papar]] in early July.{{sfn|Long|1963|pp=482–483}} Later that month the 9th Division's commander, Major General [[George Wootten]], relieved Norman from command over an incident in which he had lost control of the 2/28th Battalion during the fighting on Labuan.{{sfn|Pratten|2009|p=250}} Following the announcement of the [[surrender of Japan]] on 15 August 1945 and the formal ceremony held in Tokyo Bay on 2 September, the commander of the 37th Army, Major General [[Masao Baba]], surrendered to Wootten on 10 September at a ceremony conducted at the 9th Division's headquarters on Labuan.{{sfn|Long|1963|p=562}}

After the war, Labuan was one of several locations at which the Australian military conducted trials to prosecute suspected [[Japanese war crimes|Japanese war criminals]]. A total of 16 trials were held on the island between 3 December 1945 and 31 January 1946, during which 128 men were convicted and 17 acquitted.{{sfn|Gin|2013|p=46}} [[Labuan War Cemetery]] was also established as the burial place for all of the Commonwealth personnel killed on or near Borneo. It includes 3,900 graves, most of which are for prisoners of war who died while being held by the Japanese.<ref name="Labuan War Cemetery">{{cite web|title=Labuan War Cemetery |url=http://www.cwgc.org/find-a-cemetery/cemetery/17000/LABUAN%20WAR%20CEMETERY |publisher=Commonwealth War Graves Commission |access-date=11 January 2015 |url-status=dead |archive-url=https://web.archive.org/web/20150517030108/http://www.cwgc.org/find-a-cemetery/cemetery/17000/LABUAN%20WAR%20CEMETERY |archive-date=17 May 2015 }}</ref>

Memorials have also been erected on Labuan to mark its wartime history. These include the Australian Battle Exploit Memorial at Brown Beach, a plaque marking the location of the 37th Army's surrender ceremony and a Japanese peace park.{{sfn|Hutchinson|2006|p=261}}

== References ==

=== Citations ===
{{reflist|15em}}

=== Works consulted ===
{{Commons category|Battle of Labuan}}
{{refbegin}}
* {{cite report|last1=24th Brigade|chapter=24 Infantry Brigade – June 1945, Appendices|title=AWM52: 2nd Australian Imperial Force and Commonwealth Military Forces unit was diaries, 1939–45 War |publisher=Australian War Memorial |url=http://static.awm.gov.au/images/collection/bundled/RCDIG1024511.pdf |access-date=3 January 2015|date=1945|archive-url=https://web.archive.org/web/20150610171650/http://static.awm.gov.au/images/collection/bundled/RCDIG1024511.pdf |archive-date=10 June 2015|url-status=dead}} (page numbers cited are those of the PDF document on the AWM website)
*{{cite book |editor-last=Casey |editor-first=Hugh J. |editor-link=Hugh John Casey |title=Airfield and Base Development |series=Engineers of the Southwest Pacific |location=Washington, D.C. |publisher=United States Government Printing Office |year=1951 |oclc=220327037}}
* {{cite book|last1=Converse|first1=Allan|title=Armies of Empire: The 9th Australian and 50th British Divisions in Battle 1939–1945|date=2011|publisher=Cambridge University Press|location=Port Melbourne, Victoria|isbn=978-0-521-19480-8}}
* {{cite book|last1=Coombes|first1=David|title=Morshead: Victor of Tobruk and El Alamein|date=2001|publisher=Oxford University Press|location=South Melbourne|isbn=0-19-551398-3}}
* {{cite book |last=Coulthard-Clark |first=Chris |title=The Encyclopaedia of Australia's Battles |year=2001 |publisher=Allen & Unwin |location=Sydney |isbn=1-86508-634-7}}
*{{cite book |last1=Donnison |first1=F.S.V. |title=British Military Administration in the Far East 1943–46 |series=History of the Second World War|date=1956 |publisher=Her Majesty's Stationery Office |location=London|oclc=1198532562}}
* {{cite book|editor1-last=Gin|editor1-first=Ooi Keat|title=Japanese Empire in the Tropics: Selected Documents and Reports of the Japanese Period in Sarawak Northwest Borneo 1941–1945|volume=2|date=1998|publisher=Ohio University Press|location=Athens, Ohio|isbn=0-89680-199-3|first=A.C.L.|last=Dredge|chapter=Order of Battle: Intelligence Bulletin No. 237, 15 June 1946|pages=572–598}}
* {{cite book |last=Gill |first=G Herman |author-link=G. Hermon Gill |title=Royal Australian Navy, 1942–1945 |url=https://www.awm.gov.au/collection/RCDIG1070198/ |series=[[Australia in the War of 1939–1945]]. Series 2 – Navy |volume=II |year=1968 |publisher=Australian War Memorial |location=Canberra|oclc=65475}}
* {{cite book|last1=Gin|first1=Ooi Keat|title=Rising Sun Over Borneo: The Japanese Occupation of Sarawak, 1941–1945 |date=1999 |publisher=Macmillan Press|location=Basingstoke, Hampshire|isbn=0-333-71260-9}}
* {{cite journal|last1=Gin|first1=Ooi Keat|title=Prelude to invasion: covert operations before the re-occupation of Northwest Borneo, 1944–45|journal=Journal of the Australian War Memorial|date=2002|volume=37 |url=https://www.awm.gov.au/journal/j37/borneo.asp#28 |access-date=18 April 2015|issn=1327-0141}}
* {{cite book|last1=Gin|first1=Ooi Keat|title=Post-War Borneo, 1945–1950: Nationalism, Empire and State-Building |date=2013 |publisher=Routledge|location=London|isbn=978-0-415-55959-1}}
* {{cite book|last1=Hutchinson|first1=Garrie|title=Pilgrimage: A Traveller's Guide to Australia's Battlefields|date=2006 |publisher=Black Inc|location=Melbourne|isbn=1-86395-387-6}}
* {{cite book|last=Johnston|first=Mark|author-link=Mark Johnston (author) |title=That Magnificent 9th: An Illustrated History of the 9th Australian Division 1940–46|year=2002|publisher=Allen & Unwin|location=Sydney|isbn=1-86508-654-1}}
*{{cite book|last1=Johnston|first1=Mark|title=An Australian Band of Brothers: Don Company, Second 43rd Battalion, 9th Division |date=2018|publisher=NewSouth|location=Sydney |isbn=9781742235721}}
* {{cite book |last=Long |first=Gavin |author-link=Gavin Long|title=The Final Campaigns |url=https://www.awm.gov.au/collection/RCDIG1070206/ |series=Australia in the War of 1939–1945. Series 1 – Army |volume=VII |year=1963 |publisher=Australian War Memorial |location=Canberra|oclc=1297619}}
* {{cite book|last1=Morison|first1=Samuel Eliot|author-link=Samuel Eliot Morison|series=[[History of United States Naval Operations in World War II]]|volume=13|title=The Liberation of the Philippines – Luzon, Mindanao, the Visayas, 1944–1945|date=2002|publisher=University of Illinois Press|location=Champaign, Illinois|orig-year=1957|isbn=0-252-07064-X}}
* {{cite book |last=Odgers |first=George |author-link=George Odgers|title=Air War Against Japan, 1943–1945 |orig-year=1957 |url=https://www.awm.gov.au/collection/RCDIG1070210/|series=Australia in the War of 1939–1945. Series 3 – Air |volume=II|year=1968 |publisher=Australian War Memorial |location=Canberra|oclc=1990609}}
* {{cite book|last1=Pratten|first1=Garth|author-link=Garth Pratten|title=Australian Battalion Commanders in the Second World War |date=2009|publisher=Cambridge University Press |location=Port Melbourne, Victoria|isbn=978-0-521-76345-5}}
* {{cite book |title=World War II Pacific Island Guide. A Geo-Military Study |last=Rottman |first=Gordon L. |year=2002 |publisher=Greenwood Press |location=Westport |isbn=0-313-31395-4}}
* {{cite book|last1=Walker|first1=Allan Seymour|title=The Island Campaigns|date=1957|publisher=Australian War Memorial |location=Canberra|series=Australia in the War of 1939–1945. Series 5 – Medical|volume=III |oclc=249848614 |url=https://www.awm.gov.au/collection/RCDIG1070220/}}
*{{cite book|last1=Waters|first1=Gary|editor-last=Wahlert|editor-first=Glenn|title=Australian Army Amphibious Operations in the South-West Pacific: 1942–45|date=1995|publisher=Australian Army Doctrine Centre|location=Canberra|pages=42–59 |url=http://www.army.gov.au/~/media/Files/Our%20history/AAHU/Conference%20Papers%20and%20Images/1994/1994%20Australian%20Army%20Amphibious%20Operations%20in%20SW%20Pacific%201942-45.pdf|chapter=The Labuan Island and Brunei Bay Operations|isbn=978-0-642-22667-9 |url-status=dead|archive-url=https://web.archive.org/web/20160324104529/http://army.gov.au/~/media/Files/Our%20history/AAHU/Conference%20Papers%20and%20Images/1994/1994%20Australian%20Army%20Amphibious%20Operations%20in%20SW%20Pacific%201942-45.pdf|archive-date=2016-03-24}}
* {{cite book|last=Wilson|first=David|title=Always First: The RAAF Airfield Construction Squadrons 1942–1974 |year=1998 |publisher=Air Power Studies Centre |url=http://airpower.airforce.gov.au/Publications/Details/219/Always-First-The-RAAF-Airfield-Construction-Squadrons-19421974.aspx|location=Canberra|isbn=0-642-26525-9}}
{{refend}}

{{History of East Malaysia}}

{{Coord|5|19|13|N|115|12|40|E|type:event|display=title}}

{{DEFAULTSORT:Labuan, Battle of}}
[[Category:1945 in the British Empire]]
[[Category:Battles of World War II involving Australia]]
[[Category:Battles of World War II involving Japan]]
[[Category:Battles of World War II involving the United States]]
[[Category:North Borneo]]
[[Category:Conflicts in 1945]]
[[Category:Labuan]]
[[Category:Military history of Malaya during World War II]]
[[Category:South West Pacific theatre of World War II]]
[[Category:Borneo campaign]]
[[Category:June 1945 in Asia]]