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.
Custer Military Trail Historic Archaeological District site of the Battle of the Badlands, and portions of a military supply trail. The district was listed on the National Register of Historic Places in 2009. The district has five contributing sites. Custer Military Trail Historic Archaeological District The Custer Military Trail Historic Archeological District is a national historic district consisting of located in Billings and Golden Valley Counties in North Dakota. The district includes five historic sites associated with the Plains Indian War from 1864 to 1876. The historic sites include Initial Rock, a site where George Custer's 7th Cavalry Regiment camped on May 28, 1876, en route