He served in World War I as commanding officer of the cruiser and saw action at the Battle of Jutland in 1916 before becoming Commander of 3rd Battle Squadron in 1929 before retiring in 1931.
He served in World War I as commanding officer of the cruiser and saw action at the Battle of Jutland in 1916. After the War Casement became commanding officer of HMS Couageous in 1821, commanding officer of HMS Benbow and Commander of 3rd Battle Squadron in 1929 before retiring in 1931.