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 Pease Bottom warriors, while their wounded on the opposite bank of the river may increase this number." United States Army, Lieutenant Colonel George A. Custer, 7th United States Cavalry Regiment, Commanding. Battle of Pease Bottom The Battle of Pease Bottom, also called the Battle of the Bighorn River was a conflict between the United States Army and the Sioux on August 11, 1873 along the Yellowstone River opposite the mouth of the Bighorn River near present-day Custer, Montana. This was former Crow Indian country altered into U.S. territory on May 7, 1868. The main combatants were units of the 7th U.S. Cavalry