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 known today as Custer Hill. At least 28 bodies (the most common number associated with burial witness testimony), including that of scout Mitch Bouyer, were discovered in or near that gulch, their deaths possibly the battle's final actions. Although the marker for Mitch Bouyer has been accounted for as being accurate through archaeological and forensic testing, it is some 65 yards away from Deep Ravine. Other archaeological explorations done in Deep Ravine have found no human remains associated with the battle. According to Indian accounts, about 40 men made a desperate stand around Custer on Custer Hill, delivering volley fire.