Harold Stanley Smart was a Lance Sergeant in the 2nd Canadian Survey Regiment, No. 2 Canadian Artillery Reinforcement Unit, stationed in England during World War II. Born in Grassie, Ontario, to Frank and Edith (McLeod) Smart, Stanley had a fraternal twin brother Stuart, older siblings Murray and Kathleen, and younger siblings Norman and Helen. He joined the army ca. April 29, 1942, as a Gunner in the 1st Canadian Survey Regiment. He was later promoted to the rank of Lance Bombardier and transferred to the 2nd Survey Regiment, and eventually became a Lance Sergeant. He spent most of his time during the war in England, but also did tours of duty and spent time on leave in France, Belgium, and Holland. After the war, Stanley worked for McKinnon Brothers in St. Catharines, Ontario, which became a division of General Motors. On October 7, 1950, he married Helen Josephine Scammell and they had two children: David Stuart and Marie Helen.