 Complete the following phrase:  As he was too young, Ritchie was not immediately sent overseas until after his 18th birthday in July 1915. He was promoted to lieutet on 2 October, and served initially with the 1st Battalion, Black Watch, then part of the 1st Brigade of the 1st Division and one of the two Regular Army battalions in the regiment, in the trenches of the Western Front, where he was wounded during the Battle of Loos. After recovering from his injuries he was promoted to the temporary rank of captain on 2 March 1916, and made an acting captain on 22 April. He later served with his regiments 2nd Battalion, part of the 21st Bareilly Brigade in the 7th Meerut Division and the second of his regiments two Regular Army battalions, in the Sinai and Palestine campaign and the 