Fort Leavenworth is a United States Army installation located in Leavenworth County, Kansas, immediately north of the city of Leavenworth in the upper northeast portion of the state.
Early American explorers on the Missouri River to visit the area of Fort de Cavagnal include Lewis and Clark on 26–29 June 1804 and Stephen Harriman Long in 1819.The fort location had been chosen then because of its proximity to a large Kansa tribe village. World War I was the first opportunity to evaluate the impact of Sherman's school. Graduates excelled in planning complex American Expeditionary Forcesoperations. By the end of the war, they dominated staffs throughout the AEF.In the years between the world wars, graduates included such officers as Dwight D. Eisenhower, Omar Bradley and George S. Patton. During World War II, some 19,000 officers completed various courses at Fort Leavenworth. By the end of 1943, commanders and staffs of 26 infantry, airborne and cavalry divisions had trained as teams at the school.General Michael Joe Costello of the army of the newly formed Irish Free State attended Fort Leavenworth from 1926 to 1927, passing with such distinction that he was recommended for the United States Army War College.In 1946, the school was given its current name. In 1959, the college moved to the newly built J. Franklin Bell Hall on Arsenal Hill. In 1985, the Harold Keith Johnson wing was added to house the Combined Arms and Services Staff School (CAS3). Classes for the School of Advanced Military Studies and the School for Command Preparation, as well as the Combined Arms Research Library, are located in Eisenhower Hall which was dedicated in 1994.It was declared a National Historic Landmark in 1960.Until the early 1970s, a battery of four Nike-Hercules Missiles were deployed at Bell Point on a hill on the west side of the fort.