Sultan Sulaiman Badrul Alam Shah of Terengganu died on 25 September 1942 of blood poisoning. The Japanese Military Administration, which occupied Malaya at that time, proclaimed his son as the 15th Sultan of Terengganu bearing the title Sultan Ali Shah. However, on 1943, the Thai government under prime minister Field Marshal Plaek Pibulsonggram took over the administration of Terengganu from the Japanese and continued to recognise Sultan Ali Shah.[2]