Defense pact

A defense pact (or defence pact Commonwealth spelling) is a type of treaty or military alliance which the signatories promise to support each other militarily and to defend each other.[1] Generally, the signatories point out the threats and concretely prepare to respond to it together.[2]

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
1947 Inter-American Treaty of Reciprocal Assistance Rio Treaty

TIAR
1949 North Atlantic Treaty
1951 Mutual Defense Treaty Between the United States and the Philippines
1951 ANZUS
1953 Mutual Defense Treaty Between the United States and the Republic of Korea
1960 Treaty of Mutual Cooperation and Security Between the United States and Japan
1961 Sino-North Korean Mutual Aid and Cooperation Friendship Treaty
1971 Five Power Defence Arrangements
1979 Taiwan Relations Act
1992 Collective Security Treaty CSTO
2023 Alliance of Sahel States ASS

AES
  1. Joined as Kingdom of Greece.
  2. Joined as West Germany. After reunification in 1990, the former East German territory became covered by NATO protection.

Historical treaties
Year Treaty name Member States
1778–1798 Treaty of Alliance
1873–1887 League of the Three Emperors
1950–1979 Sino-Soviet Treaty of Friendship, Alliance and Mutual Assistance
1954–1977 Southeast Asia Treaty Organization
1955–1979 Middle East Treaty Organization
1955–1980 Sino-American Mutual Defense Treaty
1955–1991 Warsaw Pact

See also

References
  1. Volker Krause, J. David Singer "Minor Powers, Alliances, And Armed Conflict: Some Preliminary Patterns", in "Small States and Alliances", 2001, pp 15–23, ISBN 978-3-7908-2492-6 (Print) ISBN 978-3-662-13000-1 (Online)
  2. Fulvio Attinà "State aggregation in defense pacts: systemic explanations", Jean Monnet Working Papers, University of Catania, nr. 56, November 2004, ISSN 2281-9029
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