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 also accepted. Historian James Donovan states that when Custer asked interpreter Fred Gerard for his opinion on the size of the opposition, he estimated the force at between 1,500 to 2,500 warriors. Additionally, Custer was more concerned with preventing the escape of the Lakota and Cheyenne than with fighting them. From his own observation, as reported by his bugler John Martin (Martini), Custer assumed the warriors had been sleeping in on the morning of the battle, to which virtually every native account attested later, giving Custer a false estimate of what he was up against. When he and his scouts