LIBRARY OF CONGRESS
The first building constructed to consolidate all Department of War administrative operations was built in Washington, D.C., with the first phase of construction completed in 1941. Before that milestone was even reached, it had become clear that the Department of War had already outgrown the structure. The Pentagon would be built to accommodate the rapidly growing War Department, and the New War Department Building, as the original structure was called, would be used by the State Department.
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