On August 17, 1886, Capt. Moses Harris and the troops of Company M rode into Yellowstone to take over guardianship of America's first national park. Receiving orders thereupon that the company was staying indefinitely, Captain Harris ordered the construction of Camp Sheridan. Seeing no end in sight for this "temporary" duty, the US
War Department established Fort Yellowstone in 1891. For 32 years, ceremonial splendor of the US Army filled this era of Yellowstone with booming cannons at sunrise and sunset, crackling rifle-range practices, flashing saber drills, exacting military maneuvers, and dashing dress parades led by the regimental band. With the creation of the National
Park Service in 1916, the Army began a two-year administrative transition and formally abandoned Fort Yellowstone in October 1918.