William Dallas Annesley Tyndale was born in Eastbourne in Sussex, but lived in Bristol for most of his life. His father was assistant curate at Holy Trinity Horfield, and before the war William intended to follow in his fathers footsteps. He went to Lichfield Theological College to study for holy orders, but was interrupted by the war.
William enlisted in the Royal Army Medical Corps (RAMC) in July 1915, and went to the Aegean the following year. He was stationed at Salonika in Greece, where a large allied base was situated for operations agains pro-German Bulgaria.
The RAMC operated the army's medical units and provided medical detachments for the rest of the army. The Corps was assisted in its work by voluntary help from the British Red Cross, St John's Ambulance, the Friends Ambulance Unit, the Voluntary Aid Detachments and hundreds of both private and charitable ventures.
On the 1st of March 1917, William was wounded by the bursting of a shell in his rest hut. These wounds proved to be fatal, and he died on the same day. He was buried at Kilo 71, later renamed Struma Military Cemetery.