Mustered into service as a Private on December 1st, 1861
Died 17 September 1862
Private Eager was quickly promoted to Corporal then Sergeant of Company A before he was killed at the Battle of Antietam.
Soon after the death of her son Ephraim's mother Elizabeth filed for and received a "Mothers" penison from the government. In that pension file Captain Alonzo Makepeace wrote a letter to the family stating that Ephtaim was in command of the company during the battle and was currently in a marked grave. The letter was dated 18 October 1862. At some point in time during the reburial of the deceased soldiers to the national cemetery Ephraims identity was lost. He is probably in one of the "Unknown" graves at the Antietam National Cemetery.