Military alliance

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A military alliance (formerly Mutual Assistance Pact ) is a between different States closed alliance with the purpose of the military to cooperate . If it includes an intervention in favor of the partner attacked by another state, but does not become an obligation in offensive acts of war, it is also called a defense alliance, colloquially and for propaganda purposes also a brotherhood in arms (also outdated protection and defensive alliance ).

The largest military alliance on earth is NATO ( North Atlantic Treaty Organization - Organization of the North Atlantic Treaty). Its headquarters are in Brussels , the military headquarters are SHAPE (Supreme Headquarters Allied Powers in Europe) in Belgium and ACT (Allied Command Transformation) in Norfolk , Virginia, USA.

Existing military alliances

Earlier military alliances after World War II

Historical military alliances

See also


  • Friedrich Ruge : Alliances Past and Present. With special consideration of the UN, NATO, EEC and Warsaw Pact . Bernard & Graefe, Frankfurt am Main 1971, ISBN 3-7637-5105-X .
  • Katja Frehland-Wildeboer: Loyal friends? The Alliance in Europe, 1714-1914 (= Studies on International History , Volume 25). Oldenbourg, Munich 2010, ISBN 978-3-486-59652-6 , p. 30f. (Revised dissertation University of Heidelberg 2007, 478 pages).