Kammala jumla mai zuwa: Daular Japan ta mamaye Morotai a farkon 1942 a matsayin wani ɓangare na Kamfen ɗin ta na Dutch East Indies. Sojojin Amurka da kawayenta sun kaddamar da
Yaƙin Morotai a cikin 1944; bombarding tsibirin a watan Agusta kuma mamaye shi a watan Satumba. Sojojin Jafananci na daular a kan Morotai sun ci gaba har zuwa 1945 amma sun kasa fitar da sojojin Allied. A ƙarshen 1944, mutane 61,000 sun sauka a Morotai. Kashi biyu bisa uku daga cikinsu injiniyoyi ne, waɗanda suka kafa wurare da sauri ciki har da tashar jiragen ruwa da filayen jirgin sama guda biyu da kuma manyan wuraren ajiyar mai.