US Soldier killed at the Battle of the Little Big Horn. Corporal Eagan enlisted into the army on September 12, 1873, in St Louis, MO. His listed civilian occupation was listed as laborer. He was described as 5'5", sandy hair, gray eyes with a fair complexion. On October 18, 1873, Eagan reported for duty at Ft Lincoln, Dakota Territory. He was assigned to Company E, 7th US Cavalry Regiment. At the Battle of the Little Big Horn, Company E was attached to LTC General George Armstrong Custer's battalion. Sometime during the fighting Eagan was killed There were no reports from any of the burial details that Eagan's remains had been identified. It is likely that his unidentified remains were first buried where they had been found.
In 1881 all known battlefield burials were moved to a mass grave on Last Stand Hill.
Battlefield archeological excavations, and Lakota/Cheyenne accounts of the fighting, revealed evidence that Company E conducted a well organized & hard fought rear guard action from the Little Bighorn River towards Last Stand Hill, but were eventually overwhelmed & wiped out.