Where did clement attlee serve in World War 1?

Clement Attlee served in World War I as a second lieutenant in the London Regiment, specifically the 1st Battalion of the Artists Rifles. He was later transferred to the 5th Battalion of the South Lancashire Regiment, where he saw action on the Western Front. Attlee was wounded in 1917 during the Battle of the Somme, which led to him being sent back to England for recovery.