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.
Custer County, Oklahoma Custer County, Oklahoma Custer County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 27,469. Its county seat is Arapaho. The county was named in honor of General George Armstrong Custer. Custer County comprises the Weatherford, Oklahoma, Micropolitan Statistical Area. Custer County was formed on 1891 as an original county from Cheyenne land, and called G County. On November 6, 1896 it was renamed Custer County after General George Armstrong Custer, who had massacred the Southern Cheyenne Indians at the Battle of the Washita 20 miles west in Roger Mills County,