Thomas Mower McDougall subsequently he was appointed Captain, 15 Dec 1875. In 1876 Captain McDougall commanded Company B and accompanied the 7th Cavalry Regiment, under command of Lt. Col. George A. Custer in its fateful departure from Fort Abraham Lincoln to participate in what became known as the Great Sioux War of 1876, which culminated in the Battle of the Little Bighorn, also known as Custer's Last Stand which occurred on June 25–26, 1876. On May 17, 1876, the 7th Cavalry left their base at Fort Abraham Lincoln near present day Mandan, North Dakota to join in a campaign against the Sioux Indians.
George Armstrong Custer Colorado to July 28. 1867. He took part in Major General Winfield Scott Hancock's expedition against the Cheyenne. On June 26, Lt. Lyman Kidder's party, made up of ten troopers and one scout, were massacred while en route to Fort Wallace. Lt. Kidder was to deliver dispatches to Custer from General Sherman, but his party was attacked by Lakota Sioux and Cheyenne (see "Kidder massacre"). Days later, Custer and a search party found the bodies of Kidder's patrol. Following the Hancock campaign, Custer was arrested and suspended at Fort Leavenworth, Kansas to August 12, 1868 for being AWOL, after having