Dee ihe ọzọ maka paragraf a - N'oge Agha Ụwa nke Mbụ, e weghaara agwaetiti ndị dị na Pacific nke Germany ma bụrụ ndị Njikọ Mba Nile nyere ikike na 1923. Nauru ghọrọ ebe ndị Australia na-achị, ebe e nyere Japan ebe ndị ọzọ Germany na-achị na Micronesia ma kpọọ ha Ebe Ndịda Oké Osimiri. N'oge Agha Ụwa nke Abụọ, ndị agha Japan weghaara Nauru na Ocean Island, tinyere ụfọdụ n'ime agwaetiti ndị dị na Gilbert
Ndị Allied na-agafe Pacific na-agafe ha. Mgbe Japan meriri n'Agha Ụwa nke Abụọ, ikike ya ghọrọ United Nations Trusteeship nke United States na-elekọta dị ka Trust Territory of the Pacific Islands. Nauru nweere onwe ya n'afọ 1968.