Mutual Defense Assistance Agreement Between the United States and the United Kingdom of Great Britain and Northern Ireland, Released to the Press January 27, 1950.

Extract

The Governments of the United States of America and the United Kingdom of Great Britain and Northern Ireland;

Being parties to the North Atlantic Treaty signed at Washington on April 4, 1949;

Considering their reciprocal pledges under Article 3 of the North Atlantic Treaty separately and jointly with the other parties, by means of continuous and effective self-help and mutual aid, to maintain and develop their individual and collective capacity to resist armed attack;