Volhynia was completely parted after the incorporation of the east Poland into the Soviet Union in September 1939 .
Volhynia was completely divided between three oblast , Volyn , Rivne , and Ternopil .
Volhynia was completely parted after the incorporation of the east Poland into the Soviet Union in September 1939 and divided between three oblast , Volyn , Rivne , and Ternopil .