The Pentagon headquarters of the United States Department of Defense office building, opens in 1943

 

The Pentagon, which is the headquarters of the United States Department of Defense, officially opened on 15 January 1943. It is located in Arlington, Virginia, just across the Potomac River from Washington, D.C. The construction of the Pentagon began in 1941 and was completed during World War II. The building serves as the central command center for the U.S. military and is one of the largest office buildings in the world.

The Pentagon has five sides, five floors above ground, two basement levels, and a total of approximately 6.5 million square feet of office space. It houses the offices of the U.S. Department of Defense leadership, various military branches, and numerous military and civilian personnel. The building symbolizes the strength and organization of the U.S. military and has become an iconic structure in the United States.