Harry Brock was born in Arva, Canada and would eventually move to Detroit. He enlisted on September 21, 1917 and became a US citizen soon after. Harry was a Corporal and was later promoted to Sergeant on May 23, 1918 and was part of Battery C of the 330th Field Artillery. He served in England and France from July 30, 1918 to April 11, 1919. Prior to service Harry worked as a carpenter. Harry’s family, including his daughter, Mary Ann Beeman, live in Chelsea.