Complex sentence: Wheatley was commissioned as 2nd Lieutenant into the Royal Field Artillery during the First World War, undertaking his basic training at Biscot Camp in Luton, and served in France with the City of London Brigade and the 36th (Ulster) Division.
Split into simpler sentences: Wheatley was commissioned as a 2nd Lieutenant into the Royal Field Artillery during the First World War, receiving his basic training at Biscot Camp in Luton. He was assigned to the City of London Brigade and the 36th (Ulster) Division.