US Soldier fatally wounded at the Battle of the Little Big Horn. Sgt Cooney enlisted into the US Army on December 16, 1872 at Boston MA. He was described as 5'6", gray eyes, dark hair with a fair complexion. His civilian occupation was laborer. On February 9, 1873, Cooney reported for duty at Lebanon, KY. He was assigned to Company I, 7th US Cavalry Regiment. Though Company I was attached to LTC George Armstrong Custer's battalion at the Battle of the Little Bighorn, Cooney was assigned as a guard for the pack train at the rear of the column. As Custer's battalion was being defeated, the pack train arrived at Major Marcus Reno's position on a hilltop above the Little Bighorn River. During the Hilltop Fight, Cooney was received a gunshot wound to his right hip and pelvis on June 26th.
Cooney survived what must have been an agonizing journey on the Far West riverboat from the battlefield to Ft. Abraham Lincoln, Dakota Territory. He at died at Ft Lincoln from "infection of the bloodstream" on July 21, 1876. Cooney was first buried at the Ft Lincoln post cemetery. After Fort Abraham Lincoln closed, Cooney's remains were removed on March 6, 1905 and reburied at the Custer National Cemetery, just a few miles from where he had been wounded and a short distance from where most of his company had died. Cooney's aliases were Dore Cooney, Davis Cooney and Davis Corey.