This is the list of military alliances. A military alliance is a formal agreement between two or more parties concerning national security in which the contracting parties agree to mutual protection and support in case of a crisis that has not been identified in advance. Military alliances differ from coalitions, which are formed for a crisis that already exists. Numerous forms of military and defensive alliances have existed between states since early human history. This is a comprehensive list of the most important alliances.
Legend | |
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Active military alliances |
Years | Name | Members |
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c. 7th century–338 BC | Latin League | About 30 villages and tribes in the region of Latium |
c. 6th century–338 BC | Peloponnesian League | Various city-states in the Peloponnese, dominated by Sparta |
493 BC | Foedus Cassianum | Roman Republic Latin League |
478–404 BC | Delian League | See Members of the Delian League |
215 BC | Macedonian–Carthaginian Treaty | Macedonia Carthage |
433–554 | Silla-Baekje Alliance | Silla Baekje |
1123 | Pactum Warmundi | Kingdom of Jerusalem Republic of Venice |
1167–1250 | Lombard League | Numerous cities in medieval Lombardy, modern Northern Italy |
Name and description | Countries |
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CANZUK is a proposed alliance between four Commonwealth realms. | Australia Canada New Zealand United Kingdom |
United States–Israel Strategic Partnership is a proposal to make a formal alliance between the United States and Israel | Israel United States |
France–Japan Reciprocal Access Agreement is currently being negotiated to finalize a formal alliance between Japan and France.[46] | France Japan |
EU–UK Mutual Defence Agreement is a proposal, most notably from the Labour Party, to sign a formal alliance between the EU and the UK.[47] | European Union United Kingdom |
Japan–Philippines Reciprocal Access Agreement has been in negotiations due to rising political tensions in the Pacific.[48][49] | Japan Philippines |
South Korea–Japan Defense Pact[50] is a proposed alliance between South Korea and Japan in response to increased aggression from North Korea. | Japan South Korea |
Mauritius–United Kingdom Defence Agreement is a proposal to sign a military alliance between Mauritius and the UK as part of an effort to resolve the Chagos Archipelago sovereignty dispute.[51] | Mauritius United Kingdom |
Japan–Philippines–United States trilateral alliance is currently being negotiated in response to increased military build-up by China.[52] | Japan Philippines United States |
France–Philippines Visiting Forces Agreement is being negotiated.[53] | France Philippines |