A lokacin yakin duniya na biyu, Singapore ya ci nasara kuma ya mallaki Daular Japan daga 1942 zuwa 1945. Lokacin da yaƙin ya ƙare, Singapore ya koma ƙarƙashin ikon Burtaniya, tare da karuwar matakan cin gashin kai, wanda ya ƙare da haɗuwa da Singapore tare da Tarayyar Malaya don samar da Malaysia a shekarar 1963.
9 ga watan Agustan 1965