 Complete the following phrase:  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. During the war he took part in several battles, including the 