Mustered into service as a Private on December 1st, 1861
Died 17 September 1862
Unknown burial location
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 a "mothers" pension from the government. In the pension file Captain Alonzo Makepeace wrote a letter to the family stating that Ephraim was in command of the company during the battle and was currently in a marked grave. The letter was dated October 18th, 1862. At some point during the reburial of the deceased soldiers Ephraims identity was lost. He is probably in a grave at the Antietam National Cemetery marked "Unknown".