After the attack on Pearl Harbor in 1941, Fort Douglas became an induction center, a finance office, and the regional headquarters which directed operations in the Ninth Service area including the Mountain and Pacific Coastal states. After the end of the war, many activities were curtailed, and some of Fort Douglas' property was transferred to other agencies and to state government.

After World War I, the Government constructed the Ogden Arsenal as a storage base. By 1936, however, the arsenal began manufacturing its own munitions. During World War II, the facilities expanded to include a bomb and artillery plant, while simultaneously achieving the status of a master depot and distribution center for all ordnance to the western United States. In 1955, the post discontinued its operations and transferred its real estate and facilities to nearby Hill Air Force Base. The Arsenal's ordnance functions were transferred to Tooele Ordnance Depot (now Tooele Army Depot).