This thesis is an analysis of the military activities of the federal government at Fort Hays, Kansas, 1865-1889, and demonstrates that the army played a significant role in the settlement of the West. Major sources used in this study were memoirs of army officers and the various microfilmed records available from the National Archives; special attention was given to the post returns, medical records, and official correspondence. Fort Hays (first called Fort Fletcher, 1865-1866) provided protection from Indians for travelers and stage lines along the central portion of the Smoky Hill Trail du ring the early years. Later, the advance of the Union Pacific Railroad, Eastern Division, across Kansas changed the activities conducted by the militar...