~The FReeper Canteen Presents~ Road Trip: Fort Leavenworth, KansasFort Leavenworth, Kansas is the oldest continuously operating military installation west of the Mississippi River. This historic post, noted for its campus setting, open green spaces and hometown character, is the home of the US Armys Combined Arms Center (CAC). CAC, as a major subordinate headquarters of the US Army Training and Doctrine Command, has often been referred to as the Intellectual Center of the Army.