In the aftermath of World War II, the fort experienced a period of transition. The Cavalry School ceased operation in November 1946, and the last tactical horse unit inactivated the following March. Replacing the Cavalry School was the Ground General School, which trained newly commissioned officers in basic military subjects. An officer's candidate course was conducted along with training officers and enlisted men in intelligence techniques and methods. The 10th Mountain Division was activated July 1, 1948, at Fort Riley, Kansas. The 16-week basic military program conducted by this division prepared soldiers for infantry combat and duty with other infantry units.