Fort Abraham Lincoln log scouts' quarters. Water was supplied to the fort by being hauled from Missouri River in wagons, while wood was supplied by contract. By 1873, the 7th Cavalry moved into the fort to ensure the expansion of the Northern Pacific Railway. The first post commander of the expanded fort was Lieutenant Colonel George A. Custer, who held the position until his death in 1876. In 1876, the Army departed from here as part of the Great Sioux War of 1876-77, resulting in Custer's defeat at the Battle of the Little Bighorn, where they were to push the non-treaty Indians back
9th Cavalry Regiment (United States) scouting for hostile natives, escorting the mail, surveying uncharted land, and constructing roads. That service also included the Battle of Tularosa with Chiricahua Apache warriors led by Victorio in May 1880. The 9th Cavalry was transferred to Fort Riley, Kansas, in 1881, and to Fort Robinson, Nebraska, in 1885. On 5 November 1887, Company H, of the 9th Cavalry fought at the Battle of Crow Agency during the Crow War, at Crow Agency, Montana. The regiment was also patrolled during the Ghost Dance War with the Sioux around the time of the Wounded Knee Massacre and were the last regiment