After the end of World War II, the organization of the United States armed forces was reviewed with a view toward reorganization after the turbulent war years. On December 1, 1947, under a reorganization act of the armed forces approved by Congress, the unified combatant command, United States Atlantic Command, was established with headquarters co-located to those of the U.S. Atlantic Fleet.
In the post-World War II era, the US military's organizational structure underwent an evaluation to prepare for reorganization following the tumultuous war years. On December 1, 1947, a reorganization act was passed by Congress, leading to the creation of United States Atlantic Command as a unified combatant command, with its headquarters co-located with those of the U.S. Atlantic Fleet.