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.
7th Cavalry Regiment was Lt. Col. Brice C. W. Custer, the grand-nephew of former commander George Armstrong Custer. 7th Cavalry Regiment was reorganized under a new table of organization and equipment on 25 March 1949, when the troops were once again designated as companies. The 7th Cavalry fought in the Korean War's bloodiest battles. These include Hwanggan, Poksong-Dong, Kwanni, and Naktong River Defense (Battle of Pusan Perimeter). When the 1st Cavalry Division attacked north, the 7th Cavalry was in front, smashing 106 miles behind enemy lines in an historic 24 hours. Three more Presidential Unit Citations were added to the colors. In the