Rubuta ci gaba don wannan sakin layi - A lokacin Yaƙin Duniya na I, yankunan tsibirin Pacific na Jamus sun kame kuma sun zama umarnin League of Nations a 1923. Nauru ya zama umarnin Ostiraliya, yayin da sauran yankunan Jamus a Micronesia aka ba su a matsayin umarni ga Japan kuma aka kira su Dokar Kudancin Kudancin. A lokacin Yaƙin Duniya na II, sojojin Japan sun mamaye Nauru da Tsibirin Ocean, tare da mamaye wasu tsibirin Gilbert
kuma an kauce musu ta hanyar Allied ci gaba a fadin Pacific. Bayan shan kashi na Japan a Yaƙin Duniya na II, umurninsa ya zama Amintattun Majalisar Dinkin Duniya da Amurka ke gudanarwa a matsayin Yankin Amintattun Tsibirin Pacific. Nauru ta sami 'yancin kai a shekara ta 1968.