1 West Belarus, name for the western part of Belarus that was under Polish rule between 1921 and 1939 as a result of the Treaty of Riga. West Belarus, with a territory… 2 West Dvina (Zachodniaja Dźvina), a major river flowing for 328 kilometers through Belarus from east (Russia) to west (Latvia) into the Baltic Sea. On its banks,… 3 Westrussianism (zachodnierusizm), a notion among Belarusians, especially in the eastern part of the country during the latter part of the 19th and the beginning of the…