In 1940, Congress responded to the President’s call for a Navy large enough to meet any potential combination of hostile forces and authorized the “Two Ocean Navy.” To answer that demand, Naval Ammunition Depot-McAlester was commissioned to support western coastal facilities. The depot was originally built and operated exclusively by and for the Navy. In 1943, the depot’s mission was to produce, store, and ship ammunition, bombs, and mines for the Navy’s ships and aircraft. In 1975, the DOD issued a directive which assigned the Army as the Single Manager for Conventional Ammunition. In 1977, the depot was transferred to the Army and renamed the McAlester Army Ammunition Plant. Under Base Realignment and Closure 2005 actions, MCAAP acquired the Sensor Fused Weapon and missile warhead production mission from Kansas Army Ammunition Plant. It also acquired demilitarization, storage, and maintenance missions from three other installations that were closed. Today, MCAAP is a unique, major multi-mission installation with all normal base functions. MCAAP is a Government-Owned, Government-Operated installation.