Set forth below is a list of U.S. collective defense arrangements and the parties thereto:

NORTH ATLANTIC TREATY

A treaty signed April 4, 1949, by which the Parties agree that an armed attack against one or more of them in Europe or North America shall be considered an attack against them all; and each of them will assist the attacked by taking forthwith, individually and in concert with the other Parties, such action as it deems necessary, including the use of armed force.

PARTIES: United States, Albania, Belgium, Bulgaria, Canada, Croatia, Czech Republic, Denmark, Estonia, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Lithuania, Luxembourg, Netherlands, Norway, Poland, Portugal, Romania, Slovak Republic, Slovenia, Spain, Turkey, United Kingdom

AGREEMENT BETWEEN THE UNITED STATES AND
AUSTRALIA AND NEW ZEALAND

A Treaty signed September 1, 1951, whereby each of the parties recognizes that an armed attack in the Pacific Area on any of the Parties would be dangerous to its own peace and safety and declares that it would act to meet the common danger in accordance with its constitutional processes.

PARTIES: United States , Australia, New Zealand

PHILIPPINE TREATY (Bilateral)

A treaty signed August 30, 1951, by which the parties recognize that an armed attack in the Pacific Area on either of the Parties would be dangerous to its own peace and safety and each party agrees that it will act to meet the common dangers in accordance with its constitutional processes.

PARTIES: United States, Philippines

SOUTHEAST ASIA TREATY

A treaty signed September 8, 1954, whereby each party recognizes that aggression by means of armed attack in the treaty area against any of the Parties would endanger its own peace and safety and each will in that event act to meet the common danger in accordance with its constitutional processes.

PARTIES: United States , Australia, France, New Zealand, Philippines, Thailand, and the United Kingdom

JAPANESE TREATY (Bilateral)

A treaty signed January 19, 1960, whereby each party recognizes that an armed attack against either Party in the territories under the administration of Japan would be dangerous to its own peace and safety and declares that it would act to meet the common danger in accordance with its constitutional provisions and processes. The treaty replaced the security treaty signed September 8, 1951.

PARTIES: United States, Japan

REPUBLIC OF KOREA TREATY (Bilateral)

A treaty signed October 1, 1953, whereby each party recognizes that an armed attack in the Pacific area on either of the Parties would be dangerous to its own peace and safety and that each Party would act to meet the common danger in accordance with its constitutional processes.

PARTIES: United States, Korea

RIO TREATY

A treaty signed September 2, 1947, which provides that an armed attack against any American State shall be considered as an attack against all the American States and each one undertakes to assist in meeting the attack.

PARTIES: United States, Argentina, Bahamas, Bolivia, Brazil, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Guatemala, Haiti, Honduras, Nicaragua, Panama, Paraguay, Peru, Trinidad & Tobago, Uruguay, Venezuela

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NOTE: During 2004, Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovak Republic, and Slovenia were added to the list and Mexico was removed.

[This is a mobile copy of U.S. Collective Defense Arrangements]