Dedication of the Pentagon

Date: January 15, 1943 • Location: Rosslyn, United States

The highest-capacity office building in the world, the headquarters of the United States Department of Defense known as the Pentagon, was dedicated.

The United States Department of Defense (DoD), also referred to as the Department of War (DoW), is an executive department of the United States federal government charged with coordinating and supervising the United States Armed Forces—the Army, Navy, Marines, Air Force, Space Force, and, for some purposes, the Coast Guard—and related functions and agencies. Headquartered at the Pentagon in Arlington County, Virginia, just outside Washington, D.C., the stated mission of the Department of Defense is "to provide the military forces needed to deter war and ensure our nation's security".