In early 1945 he led the 4/8th Gurkhas, part of IV Corps, across the River Irrawaddy and hard fighting against the main body of the Japanese Army in Burma. In June he was appointed GSO 1 in his division's (7 Indian Division) Headquarters, although circumstances dictated that he had to return part-time to 4/8th Gurkhas as their commanding officer again. A highly unusual situation. He was mentioned in dispatches and at the end of the war he was awarded the Distinguished Service Order (DSO) and 7th Indian Infantry Division moved to occupy Thailand where Walker was involved in negotiating the surrender of Japanese forces in that country.