[edit] World War II
During World War II, Jefferson Barracks was a major reception center for troops being drafted into the military. It also served as a basic training site for the Army, then later was the first Army Air Corps Training Site. During World War II, Jefferson Barracks had a peak area of 1,518 acres (6.14 km²), and had billeting space for 16 officers and 1,500 enlisted persons.
Jefferson Barracks was decommissioned as a military post in 1946 with the end of World War II.