Thomas Custer in the Yellowstone Expedition of 1873, where he fought in the Battle of Honsinger Bluff, and the Black Hills Expedition of 1874. Custer was appointed captain in 1875 and given command of Company C of the 7th Cavalry. In 1874, at the trading post at Standing Rock Agency, Custer participated in the arrest of chief Rain-in-the-Face (Lakota), suspected in the 1873 murder of Dr. John Honsinger. During the 1876 Little Bighorn campaign of the Black Hills War, he served as aide-de-camp to his older brother Lt. Col. George A. Custer and died with his brother on June 25, 1876. Lt.
Battle of the Little Bighorn around June 26 or 27 in an attempt to engulf the Native Americans. On June 22, Terry ordered the 7th Cavalry, composed of 31 officers and 566 enlisted men under Custer, to begin a reconnaissance in force and pursuit along the Rosebud, with the prerogative to "depart" from orders if Custer saw "sufficient reason". Custer had been offered the use of Gatling guns but declined, believing they would slow his command. While the Terry–Gibbon column was marching toward the mouth of the Little Bighorn, on the evening of June 24, Custer's Indian scouts arrived at an overlook known as the