Volhynia
After the end of World War I, Volhynia was partitioned between Poland and the Soviet Union, with western Volhynia becoming a part of Poland and eastern Volhynia becoming a part of the Soviet Union, specifically a part of the Ukrainian SSR. Volhynia experienced a Ukrainianization movement in the 1920s but a lot of its notable Ukrainian intellectuals were later murdered in Joseph Stalin's Great Purge in the late 1930s.