 Tuker commanded the 4th Indian Division until 4 February 1944 when he became seriously ill and for nearly a year took no part in the war.While recovering he assumed light duties as General Officer Commanding, Ceylon from March 1944 to September 1944, before becoming Chairman of the Frontier Commission in India.On 14 July 1945 he was put in temporary command of the IV Corps in Burma while Frank Messervy took leave for a month, taking part in the defeat of the Japanese breakout attempt at the Sittang in July and August.