Political map of East Asia and the Western Pacific 06 April 1920 (Creation of the Far Eastern Republic): By early 1920, the Soviets had effectively won the Russian Civil War (Russian Civil War). However, as opposing regimes collapsed across the Russian Far East, communist partisans came into conflict with the Japanese garrisons spread across the region (Japan during the Siberian Intervention). In response, the Soviets declared an independent Far Eastern Republic (Far Eastern Republic) to serve as a buffer between them and Japan.