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.
Battle of Prairie Dog Creek (1876) Battle of Prairie Dog Creek (1876) The Battle of Prairie Dog Creek, also known as the Skirmish at Tongue River Heights, or the Battle of the Tongue River (1876), part of the Great Sioux War of 1876, occurred on June 9, 1876, at the confluence of Prairie Dog Creek and the Tongue River primarily in Wyoming Territory. On June 9, 1876, soldiers and civilians under the command of Brigadier General George R. Crook, were encamped on the Tongue River at the mouth of Prairie Dog Creek. With Crook, were over 950 United States cavalry and infantry soldiers, and about 100