Rio Treaty

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Rio Treaty

(Inter-American Treaty of Reciprocal Assistance), signed Sept. 2, 1947, and originally ratified by all 21 American republics. Under the treaty, an armed attack or threat of aggression against a signatory nation, whether by a member nation or by some other power, will be considered an attack against all (see Pan-AmericanismPan-Americanism,
movement toward commercial, social, economic, military, and political cooperation among the nations of North, Central, and South America. In the Nineteenth Century
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). The treaty provides that no member can use force without the unanimous consent of the other signatories, but that other measures against aggressors may be approved by a two-thirds majority. It differs from previous inter-American treaties in that it is a regional treaty within a larger international organization; it recognizes the higher authority of the Security Council of the United Nations.
References in periodicals archive ?
OAS, Twenty-Fourth Meeting of Consultation of Ministers of Foreign Affairs Acting as Organ of Consultation in Application of the Inter-American Treaty of Reciprocal Assistance, doc.
As a part of postwar agreements that led lip to the adoption of the OAS Charter, the Inter-American Treaty of Reciprocal Assistance (Rio Treaty) was to play a substantial role over the next forty years in the resolution of conflicts and long-standing disputes that periodically flared between countries, as well as the shifting alignment of American nations in the Cold War.
In September 2001, the OAS swiftly condemned the terrorist attacks on the United States and invoked the Inter-American Treaty of Reciprocal Assistance (known as the "Rio Treaty") and pledged to cooperate in counter-terrorism efforts.

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