 The last influx of people arrived upon the completion of the Trans-Siberian Railroad.In April 1920, the Far Eastern Republic, with its capital in Chita, was formed from Amur, Transbaikal, Kamchatka, Sakhalin, and Primorye regions as a democratic "buffer" state in order to avoid war with Japan.It existed until November 1922, when it joined the RSFSR.