The arrival of the Japanese forces to Borneo and the fall of Anglo-Japanese Alliance had already been predicted by revelation through secret telegrams that Japanese ships docked regularly at Jesselton were engaged in espionage. Many of the British and Australian soldiers captured after the fall of Malaya and Singapore were brought to North Borneo and held as a prisoners of war (POWs) in Sandakan camp where they were then forced to march from Sandakan to Ranau. Other POWs were also sent to Batu Lintang camp in neighbouring Sarawak. The occupation drove residents in the coastal areas to the interior in searching for food and escaping the brutality during the war period, which led to the creation of several resistance movements; one of the such movement known as the Kinabalu Guerrillas which led by Albert Kwok and supported by indigenous groups in North Borneo.