Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  N'afọ 1858, Green Russell na otu ìgwè ndị Jọjia, mgbe ha nụrụ akụkọ banyere ọlaedo dị na South Platte site n'aka ndị Cherokee mgbe ha si California lọta, malitere igwu ala n'ebe ahụ ha kọwara. N'oge okpomọkụ ahụ, ha guzobere ogige ebe a na-egwupụta ọlaedo bụ́ Auraria (nke a na-akpọ aha ogige ebe a na-egwupụta ọlaedo na Georgia) n'ebe Osimiri South Platte na Cherry Creek jikọrọ ọnụ. N'oge oyi na-eso ya, ndị Georgia ahụ laghachiri n'obodo ha. Na Bent's Fort nke dị n'akụkụ Osimiri Arkansas, Russell gwara William Larimer, Jr., onye na-atụ anya ala na Kansas, banyere ọlaedo ha chọtara. Larimer, n'ịghọta ohere o nwere iji ya mee ihe, mere ngwa ngwa gaa Auraria. Na Nọvemba 1858, o kwuru na mpaghara dị n'ofe Cherry Creek site na Auraria ma kpọọ ya "Denver City" na nsọpụrụ nke James W. Denver, onye gọvanọ ugbu a nke Kansas Territory. Larimer ebughị n'obi igwupụta ọlaedo n'onwe ya; ọ chọrọ ịkwalite obodo ọhụrụ ahụ ma resị ndị na-egwupụta ọlaedo na-anụ ọkụ n'obi ala na ụlọ.  Ajụjụ: Ebee ka Bent Fort dị?
n'akụkụ Osimiri Arkansas