Defense pact

Template:Short description Template:Use American English Template:Use dmy dates A defense pact (Commonwealth spelling: defence pact) is a type of treaty or military alliance in which the signatories promise to support each other militarily and to defend each other. Generally, the signatories point out the threats and concretely prepare to respond to it together.

Current treaties

Year	Name		Member states
	Treaty name	Also known as	Present members	Former/suspended members
1373	Anglo-Portuguese Treaty of 1373	Anglo-Portuguese Alliance	Template:Country data Portugal Template:Country data United Kingdom
1947	Inter-American Treaty of Reciprocal Assistance	Rio Treaty TIAR	Template:Country data Argentina Template:Country data Brazil Template:Country data Chile Template:Country data Colombia Template:Country data Costa Rica Template:Country data Dominican Republic Template:Country data El Salvador Template:Country data Guatemala Template:Country data Haiti Template:Country data Honduras Template:Country data Panama Template:Country data Paraguay Template:Country data Peru Template:Country data United States Template:Country data Uruguay (1948–2019, 2020–present) Template:Country data Venezuela (1948–2015, 2019–present) Template:Country data Trinidad & Tobago (1967–present) Template:Country data The Bahamas (1982–present)	Template:Country data Cuba (1948–1962) (suspended) Template:Country data Bolivia (1948–2014) Template:Country data Ecuador (1948–2016) Template:Country data Mexico (1948–2004) Template:Country data Nicaragua (1948–2014)
1949	North Atlantic Treaty	Washington Treaty NATO OTAN	Template:Country data Belgium Template:Country data Canada Template:Country data Denmark Template:Country data France Template:Country data Iceland Template:Country data Italy Template:Country data Luxembourg Template:Country data Netherlands Template:Country data Norway Template:Country data Portugal Template:Country data United Kingdom Template:Country data United States Template:Country data Kingdom of Greece (joined 1952) Template:Country data Turkey (joined 1952) Template:Country data Germany (joined 1955) Template:Country data Spain (joined 1982) Template:Country data Czechia (joined 1999) Template:Country data Hungary (joined 1999) Template:Country data Poland (joined 1999) Template:Country data Bulgaria (joined 2004) Template:Country data Estonia (joined 2004) Template:Country data Latvia (joined 2004) Template:Country data Lithuania (joined 2004) Template:Country data Romania (joined 2004) Template:Country data Slovakia (joined 2004) Template:Country data Slovenia (joined 2004) Template:Country data Albania (joined 2009) Template:Country data Croatia (joined 2009) Template:Country data Montenegro (joined 2017) Template:Country data North Macedonia (joined 2020) Template:Country data Finland (joined 2023) Template:Country data Sweden (joined 2024)	Template:Country data British Cyprus (1949-1960) Template:Country data French Algeria (1949-1962) Template:Country data Crown Colony of Malta (1949-1964)
1951	Mutual Defense Treaty Between the United States and the Republic of the Philippines		Template:Country data Philippines Template:Country data United States
1951	ANZUS		Template:Country data Australia Template:Country data New Zealand Template:Country data United States
1953	Mutual Defense Treaty between the United States and the Republic of Korea		Template:Country data South Korea Template:Country data United States
1960	Treaty of Mutual Cooperation and Security between the United States and Japan		Template:Country data Japan Template:Country data United States
1961	Sino-North Korean Treaty of Friendship, Co-operation, and Mutual Assistance		Template:Country data China Template:Country data North Korea
1992	Collective Security Treaty	CSTO	Template:Country data Armenia Template:Country data Belarus Template:Country data Kazakhstan Template:Country data Kyrgyzstan Template:Country data Russia Template:Country data Tajikistan	Template:Country data Azerbaijan (1994–1999) Template:Country data Georgia (1994–1999) Template:Country data Uzbekistan (1994–1999, 2006–2012)
2019	Treaty on Franco-German Cooperation and Integration	Aachen Treaty	Template:Country data France Template:Country data Germany
2021	Franco-Greek defence agreement		Template:Country data France Template:Country data Greece
2023	Alliance of Sahel States		Template:Country data Burkina Faso Template:Country data Mali Template:Country data Niger
2024	North Korean–Russian Treaty on Comprehensive Strategic Partnership		Template:Country data North Korea Template:Country data Russia

Historical treaties

Year	Treaty name	Member States
1778–1798	Treaty of Alliance	Template:Flagicon Kingdom of France (Template:Flagicon French First Republic from 1792) Template:Flagicon United States
1873–1887	League of the Three Emperors	Template:Flagicon German Empire Template:Flagicon Austria-Hungary Template:Flagicon Russian Empire
1950–1979	Sino-Soviet Treaty of Friendship, Alliance and Mutual Assistance	Template:Flagicon China Template:Flagicon Soviet Union
1954–1977	Southeast Asia Treaty Organization	Template:Flagicon Australia Template:Flagicon France Template:Flagicon New Zealand Template:Flagicon Pakistan (withdrew in 1973) Template:Flagicon Philippines Template:Flagicon Thailand Template:Flagicon United Kingdom Template:Flagicon United States
1955–1979	Middle East Treaty Organization	Template:Flagicon Iran Template:Flagicon Iraq (withdrew in 1959) Template:Flagicon Pakistan Template:Flagicon Turkey Template:Flagicon United Kingdom
1955–1980	Sino-American Mutual Defense Treaty	Template:Flagicon Taiwan Template:Flagicon United States
1955–1991	Warsaw Pact	Template:Flagicon Albania (withdrew in 1968) Template:Flagicon Bulgaria Template:Flagicon Czechoslovakia Template:Flagicon East Germany Template:Flagicon Hungary Template:Flagicon Poland Template:Flagicon Romania Template:Flagicon Soviet Union

See also

• Military alliance
• List of military alliances