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Mutual Defense Treaty, the Republic of Korea and the United States of America

Signed at Washington: October 1, 1953
Entered into Force: November 17, 1954

The Parties to this Treaty,

Reaffirming their desire to live in peace with all governments, and desiring to strengthen the fabric of peace in the Pacific area,

Desiring to declare publicly and formally their common determination to defend themselves against external armed attack so that no potential aggressor could be under the illusion that either of them stands alone in the Pacific area,

Desiring further to strengthen their efforts for collective defense for the preservation of peace and security pending the development of a more comprehensive and effective system of regional security in the Pacific area,

Have agreed as follows:

Article 1

The Parties undertake to settle any international disputes in which they may be involved by peaceful means in such a manner that international peace and security and justice are not endangered and to refrain in their international relations from the threat or use of force in any manner inconsistent with the purposes of the United Nations, or obligations assumed by any Party towards the United Nations.

Article 2

The Parties will consult together whenever, in the opinion of either of them, the political independence or security of either of the Parties is threatened by external armed attack. Separately and jointly, by self-helf and mutual aid, the Parties will maintain and develop appropriate means to deter armed attack and will take suitable measures in consultation and agreement to implement this Treat and to further its purposes.

Article 3

Each Party recognizes that an armed attack in the Pacific area on either of the Parties in territories now under their respective administrative control, or hereafter recognized by one of the Parties as lawfully brought under the administrative control of the other, 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.

Article 4

The Republic of Korea grants, and the United States of America accepts, the right to dispose United States land, air and sea forces in and about the territory of the Republic of Korea as determined by mutual agreement./p>

Article 5

This Treaty shall be ratified by the United States of America and the Republic of Korea in accordance with their respective constitutional processes and will come into force when instruments of ratification thereof have been exchanged by them at Washington

Article 6

This Treaty shall remain in force indefinately. Either party may terminate it one year after notice has been given to the other Party.


IN WITNESS WHEREOF the undersigned plenipotentiaries have signed this Treaty.

Done in duplicate at Washington, in the Korean and English languages, this first day of October, 1953.

For the Republic of Korea:
(signed) Y.T. Pyun
For the United States of America:
(signed) John Foster Dulles

Understanding of the United States of America

It is the understanding of the United States that neither party is obligated, under Article 3 of the above Treaty, to come to the aid of the other except in case of an external armed attack against such party; nor shall anything in the present Treaty be construed as requiring the United States to give assistance to Korea except in the event of an armed attack against territory which has been recognized by the United States or lawfully brought under the administrative control of the Republic of Korea.