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Rio Treaty (TIAR)

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description Rio Treaty (TIAR) Overview

The Rio Treaty, formally the Inter-American Treaty of Reciprocal Assistance, is a mutual defense agreement signed in 1947 in Rio de Janeiro by nations of the Americas. The treaty's core principle is that an armed attack against one member state is considered an attack against all, establishing a framework for collective defense in the Western Hemisphere. It served as a foundational security mechanism for the Organization of American States during and after the Cold War.

help Rio Treaty (TIAR) FAQ

What is the Rio Treaty?

The Rio Treaty is the common name for the Inter-American Treaty of Reciprocal Assistance, or TIAR. It is a mutual-defense agreement signed in Rio de Janeiro in 1947.

What does the Rio Treaty promise after an attack?

Its core principle is that an armed attack against one member is considered an attack against all. Members can then consult and decide on collective measures.

Which region does the Rio Treaty cover?

The treaty was created by nations of the Americas. Its purpose is collective security within the inter-American system.

Is the Rio Treaty the same as NATO?

No. The Rio Treaty is a separate defense agreement for countries in the Americas, while NATO is a transatlantic alliance created in 1949.

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