Sassoon was wounded again on 13 July 1918—reportedly by friendly fire when he was injured by a shot to the head by a fellow British soldier who had apparently mistaken him for a German, near Arras, France (per a 2018 story published by a British online tabloid, it was suggested that the friendly fire incident was not accidental, however the veracity of this claim is in some question). As a result of this injury, he spent the remainder of the war in Britain. By this time, he had been promoted to acting captain. He relinquished his commission on health grounds on 12 March 1919, but retained the rank of captain.
Sassoon was wounded again on 13 July 1918—reportedly by friendly fire when he was injured by a shot to the head by a fellow British soldier who had apparently mistaken him for a German, near Arras, France (per a 2018 story published by a British online tabloid, it was suggested that the friendly fire incident was not accidental, however the veracity of this claim is in some question). As a result of this injury, he spent the remainder of the war in Britain. By this time, he had been promoted to acting captain He relinquished his commission on health grounds on 12 March 1919, but retained the rank of captain.