Years | Name | Members |
1902–1923 | Anglo-Japanese Alliance | Japan
United Kingdom |
1904 | Entente Cordiale[note 3] | France
United Kingdom |
1904 | Treaty of Sofia | Principality of Bulgaria
Kingdom of Serbia |
1907–1917 | Triple Entente | France
Russian Empire
United Kingdom |
1912–1913 | Balkan League | Kingdom of Bulgaria
Greece
Kingdom of Montenegro
Kingdom of Serbia |
1913–1914 | Greek–Serbian Alliance | Greece
Serbia |
1914–1918 | Central Powers | Austria-Hungary
Bulgaria
German Empire
Ottoman Empire |
1914–1918 | Ottoman–Bulgarian alliance | Bulgaria
Ottoman Empire |
1915–1918 | Bulgaria–Germany treaty (1915) | Bulgaria
German Empire |
1915–1918 | German–Ottoman alliance | German Empire
Ottoman Empire |
1916–1918 | Treaty of Bucharest (1916) | France
Italy
Romania
Russian Empire
United Kingdom |
1920–1921 | Polish-Ukrainian Agreement | Poland
Ukraine |
1920–1938 | Little Entente | Czechoslovakia
Romania
Yugoslavia |
1920–1940 | Franco-Polish Alliance (1921) | France
Poland |
1920–1921 | Georgian–Polish alliance | Georgia
Poland |
1921–1939 | Polish–Romanian alliance | Poland
Romania |
1922–1930 | Anglo-Iraqi Treaty of 1922 | Iraq
United Kingdom |
1924–1938 | Treaty of Alliance and Friendship between France and Czechoslovakia | Czechoslovakia
France |
1930–1939/40 | Finnish–Estonian defence cooperation | Estonia
Finland |
1930–1947 | Anglo-Iraqi Treaty of 1930 | Iraq
United Kingdom |
1934–1938 | Balkan Pact | Greece
Romania
Turkey
Yugoslavia |
1934–1938 | Rome Protocols | Austria
Hungary
Italy |
1934–1935 | Stresa Front | France
Italy
United Kingdom |
1934-1940 | Baltic Entente | Estonia
Latvia
Lithuania |
1935–1938 | Czechoslovak–Soviet Treaty of Mutual Assistance | Czechoslovakia
Soviet Union |
1935–1939 | Franco-Soviet Treaty of Mutual Assistance | France
Soviet Union |
1936–1956 | Anglo-Egyptian Treaty of 1936 | Egypt
United Kingdom |
1939–1944 | Anglo-Polish alliance | Poland
United Kingdom |
1939–1945 | Iberian Pact | Portugal
Spain |
1939–1940 | Soviet–Estonian Mutual Assistance Treaty | Estonia
Soviet Union |
1939–1940 | Soviet–Latvian Mutual Assistance Treaty | Latvia
Soviet Union |
1939–1940 | Soviet–Lithuanian Mutual Assistance Treaty | Lithuania
Soviet Union |
1939–1949[note 4] | Pact of Steel | Germany
Italy |
1940 | Ogdensburg Agreement | Canada
United States |
1936–1945 | Axis powers | Germany
Italy
Japan |
1940–1945 | Tripartite Pact | Bulgaria
Croatia
Germany
Hungary
Italy
Japan
Romania
Slovakia
Yugoslavia[note 5] |
1941–1945 | Anglo-Soviet Agreement | Soviet Union
United Kingdom |
1942–1945 | Anglo-Soviet Treaty of 1942 | Soviet Union
United Kingdom |
1942–1945 | Declaration by United Nations | |
1942–1945 | Croatian–Romanian–Slovak friendship proclamation | Croatia
Romania
Slovakia |
1943 | Five Eyes (FVEY) | Australia
Canada
New Zealand
United Kingdom
United States |
1946–1948 | Treaty of London (1946)[3] | Jordan
United Kingdom |
1947–1957 | UK–Ceylon Defence Pact[4][5] | Ceylon
United Kingdom |
1947–1997 | Treaty of Dunkirk | France
United Kingdom |
1947 | Inter-American Treaty of Reciprocal Assistance (Rio Pact) | |
1948–1954 | Western Union (WU)[note 6] | Belgium
France
Luxembourg
Netherlands
United Kingdom |
1949 | North Atlantic Treaty Organization (NATO)[note 7] | |
1949–1989 | Secret Swedish–American Alliance[6] | Sweden
United States |
1950–1979 | Sino-Soviet Treaty of Friendship, Alliance and Mutual Assistance | China
Soviet Union |
1951 | Mutual Defense Treaty between the Republic of the Philippines and the United States of America (MDT) | Philippines
United States |
1951 | Australia, New Zealand, United States Security Treaty (ANZUS) | Australia
New Zealand (treaty lapsed with United States)
United States (treaty lapsed with New Zealand) |
1951 | US–Japan Alliance | Japan
United States |
1952 | Brazil–United States Treaty | Brazil
United States |
1952 | US–Israel Mutual Defense Assistance Agreement[7] | Israel
United States |
1953 | Mutual Defense Treaty between the United States and the Republic of Korea | South Korea
United States |
1953 | United Nations Command (UNC) | |
1953–1956 | Agreement of Friendship and Cooperation | Greece
Turkey
Yugoslavia |
1954 | Mutual Defense Assistance Agreement (United States–Pakistan) | Pakistan United States |
1954–1977 | Southeast Asia Treaty Organization (SEATO) | |
1954–2011 | Western European Union (WEU) | |
1955–1979 | Central Treaty Organization (CENTO), previously known as the Middle East Treaty Organization (METO) | Iran
Iraq (withdrew in 1959)
Pakistan
Turkey
United Kingdom |
1955–1991 | Treaty of Friendship, Cooperation and Mutual Assistance, or Warsaw Pact (WP) | |
1955–1975 | Simonstown Agreement | South Africa
United Kingdom |
1955–1980 | Mutual Defense Treaty between the United States and the Republic of China | China (Republic of China)
United States |
1957–1967 | Anglo-Malayan Defence Agreement (AMDA) | Malaya
United Kingdom |
1958–1962 | Anglo-Nigerian Defence Agreement[8] | Nigeria
United Kingdom |
1958 | Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the uses of Atomic Energy for Mutual Defense Purposes, or 1958 UK–US Mutual Defence Agreement | United Kingdom
United States |
1960 | Treaty of Mutual Cooperation and Security between the United States and Japan | Japan
United States |
1961–1996 | Soviet-North Korean Friendship, Cooperation, and Mutual Assistance Treaty[9][10] | Soviet Union
North Korea |
1961 | Sino-North Korean Mutual Aid and Cooperation Friendship Treaty | China
North Korea |
1962 | Thanat–Rusk Communiqué | Thailand
United States |
1964–1979 | Anglo-Maltese Defence Agreement[11] | Malta
United Kingdom |
1967–1972 | Egypt–Jordan Mutual Defense Agreement[12] | Egypt
Jordan |
1968–1974 | Mauritius–United Kingdom Mutual Defence and Assistance Agreement[13][14] | Mauritius
United Kingdom |
1970–1974 | Alcora Exercise | Portugal
Rhodesia
South Africa |
1971 | Five Power Defence Arrangements (FPDA) | Australia
Malaysia
New Zealand
Singapore
United Kingdom |
1975–1994 | Israel–South Africa Agreement (ISSA) | Israel
South Africa |
1979 | Taiwan Relations Act | Taiwan
United States |
1982 | Regional Security System (RSS) | |
1984 | Peninsula Shield Force | Bahrain
Kuwait
Oman
Qatar
Saudi Arabia
United Arab Emirates |
1987 | Ronald Reagan's Major Non-NATO Ally (MNNA) Designation for Australia | Australia
United States |
1987 | Ronald Reagan's Major Non-NATO Ally (MNNA) Designation for Egypt | Egypt
United States |
1987 | Ronald Reagan's Major Non-NATO Ally (MNNA) Designation for Israel | Israel
United States |
1987 | Ronald Reagan's Major Non-NATO Ally (MNNA) Designation for Japan | Japan
United States |
1987 | Ronald Reagan's Major Non-NATO Ally (MNNA) Designation for South Korea | South Korea
United States |
1994 | Compact of Free Association (COFA) | Marshall Islands
Federated States of Micronesia
Palau
United States |
1992 | Collective Security Treaty Organization (CSTO) | |
1996 | Bill Clinton's Major Non-NATO Ally (MNNA) Designation for Jordan | Jordan
United States |
1997 | Bill Clinton's Major Non-NATO Ally (MNNA) Designation for New Zealand | New Zealand
United States |
1997 | Union State of Russia and Belarus | Belarus
Russia |
1998 | Bill Clinton's Major Non-NATO Ally (MNNA) Designation for Argentina | Argentina
United States |
1999 | European Union (EU)[note 8] | [15] |