sentences:  He returned to Crown Point after several years in California, and resumed working in his family's businesses.At the start of the American Civil War, he assisted in raising and equipping a unit which was mustered into service as Company H, 34th New York Volunteer Infantry.He later helped raise a cavalry company, which he joined as a private; this unit became Company H, 5th New York Volunteer Cavalry Regiment, and the members elected Hammond to be their commander with the rank of captain.