Civil War Union Soldier. He was mustered in as a Private in Company D, 124th Pennsylvania Volunteer Infantry on August 9, 1862. A little over a month later his regiment participated in the bloody Battle of Antietam, Maryland. There it fought near the North Woods and the Cornfield on Hagerstown Turnpike, sustaining 64 casualties. One of the casualties was Private Eckfeldt, who was listed as missing in action after the battle was over, and his body was never identified. Undoubtedly he lies in an "Unknown" grave in the Antietam National Cemetery. His family erected a monument to him in his Family plot in Chester Rural Cemetery.