On May 17, 1876, Lt. Col. George Armstrong Custer and the 7th U.S. Cavalry marched from Fort Abraham Lincoln, Dakota Territory, to destiny at Little Big Horn. Not so well-known is the fact that a battery of three .50 caliber Gatling guns accompanied the expedition, mobilized to subjugate the non-reservation, “hostile” Lakota Sioux bands led by Sitting Bull and Crazy Horse in Montana Territory. Second Lt. William H.