Fort McClellan, originally Camp McClellan, is a decommissioned United States Army post located adjacent to the city of Anniston, Alabama. During World War II, it was one of the largest U.S. Army installations, training an estimated half-million troops. After the war it became the home of the Military Police Corps, the Chemical Corps and the Women's Army Corps. From 1975 until it was closed in 1999, Fort McClellan was home of the Military Police Corps and the One Station Unit Training (OSUT) Military Police School. Also after World War II until it was closed in 1999, it was home of the Chemical Corps School, which trained soldiers in chemical warfare. In 1988, Fort McClellan was used as an alternate training academy for the United States Border Patrol. Before its closure by the Base Realignment and Closure commission (BRAC), the post employed about 10,000 military personnel (half of whom were permanently assigned) and about 1,500 civilians. It underwent unexploded ordnance (UXO) clean up from 2003 to 2014. Since 2010, about 3,000 acres of the post's brownfield land have been redeveloped as a mixed-use community. The portion of the post which has not been redeveloped is currently owned by the Alabama Army National Guard and is used as a training facility for units from all across the state, also housing the Alabama Army National Guard’s Officer Candidate School, for enlisted soldiers looking to earn their commission.