The unit was inactivated 4 January 1946 at Camp Kilmer, New Jersey and later redesignated 3 November 1948 in New Orleans, Louisiana, as the 377th Transportation Major Port.

Later, the unit moved to Fort Eustis, Virginia and stayed on active Federal Service until 10 October 1952.

On 1 October 1998 the TAACOM wartime mission expanded and the unit designation was changed to the 377th Theater Support Command.

Whether at home station, deployed across the country or overseas, the TSC trains to achieve its peacetime and wartime mission of providing command and control of assigned units to ensure and maintain a high state of readiness.

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