Eighteenth Air Force
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Extensive troop carrier operations within Tactical Air Command during the early 1950s called for some intermediate echelon of command, and HQ USAF created Eighteenth Air Force for this purpose in March 1951. Later, Eighteenth Air Force received other combat units in addition to troop carrier wings. Twelfth Air Force absorbed all of its resources on January 1, 1958.

The original article can be found at: http://en.wikipedia.org/wiki/Eighteenth_Air_Force.
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