William Halsey was born in 1843, in Ohio, the son of Charles (b. 1804) and Phebe (b. 1803).
New York natives Charles and Phebe moved to Michigan and by 1860 had settled in Grand Rapids' Fifth Ward where William was working as a blacksmith’s apprentice with his father.
William was 18 years old and possibly living in Grand Rapids, Michigan, when he enlisted with his parents’ consent in Company K on May 13, 1861. He was reported missing in action on August 29, 1862, at Second Bull Run. In fact, he had been wounded seriously, resulting in the amputation of a limb, and was subsequently hospitalized at Fairfax Seminary.
He died from his wounds on either September 19 or October 1, 1862, at Ebenezer hospital in Washington, DC, and was buried in the Military Asylum cemetery (Soldier's Home National cemetery) in Washington.
No pension seems to be available.