Camp Navajo was originally opened in 1942 in Bellemont, Arizona. It was originally designated Navajo Ordnance Depot, and its primary use was the storage of ammunition used in the Pacific Theater of World War II. It was renamed Navajo Army Depot in 1965, changed to Navajo Depot Activity in 1982, and then changed in 1993 to its current name. In 1993 the Department of Defense transferred all ammunition activities to Hawthorne Army Ammunition Plant in Nevada.