 During the Second World War he mainly served in training and staff roles, but saw combat against the Japanese at Wewak late in the war.In the post-war period he had a significant influence on the training of the Australian Army, which he helped re-orient to warfare in South East Asia, heading the jungle training centre at Canungra in 1955 and developing the army's counter-insurgency doctrine.He instructed the armed forces of Burma in jungle warfare in the late 1950s and was a strategic advisor to the Burmese Army from 1960 to 1962.