After Turkey joined NATO in 1952, JAMMAT became the largest of the United States European Commands (USEUCOM).

After the British government declared on 21 February 1947 its inability to provide financial aid (though she would establish the Central Treaty Organization a decade later), Turkey turned towards the United States, who drew up the Truman Doctrine, pledging to "support free peoples who are resisting attempted subjugation by armed minorities or by outside pressures".

This figure was raised to $233 million by 1950, after Turkey contributed a brigade of about 5000 men to the United Nations forces in the Korean War.

[3] In August 1947, the American Military Mission for Aid to Turkey (AMMAT) was established in Ankara under the authority of the US ambassador.

[9] JAMMAT was renamed to Joint United States Military Mission for Aid to Turkey (JUSMMAT) in 1958, and the Office of Defense Cooperation Turkey (ODC-T) (Turkish: ABD Savunma İşbirliği Ofisi) on 1 May 1994.