Lithuania, Poland, Belarus, and Ruthenes comprise because of all the overlap and competition over historical sources. It corresponds to NW Region in “Regions” category, which also includes parts of Poland and Ukraine. After 1870, the provinces were subdivided accordingly, although conversationally they were usually “western”: NW, under the governor general of Vilna (Vilna, Grodno, Kovno); the “western” provinces (Minsk, Vitebsk, Mogilev); and the SW provinces (Kiev, Podolia, Volhynia), under thgovernor general of Kiev.