Page "Territories of Poland annexed by the Soviet Union" Paragraph 13

Territories around Wilno ( now Vilnius ) annexed by Poland in 1920, were transferred to Lithuania on a base of Lithuania-Soviet Union agreement ( however Lithuania was soon annexed by Soviet Union to become the Lithuanian SSR ).

Other northern territories were attached to Belastok Voblast, Hrodna Voblast, Navahrudak Voblast ( soon renamed to Baranavichy Voblast ), Pinsk Voblast and Vileyka ( later Maladzyechna ) Voblast in Byelorussian SSR.

The territories to the south were transferred to the Ukrainian SSR: Drohobych Oblast, Lviv Oblast, Rivne Oblast, Stanislav ( later known as Ivano-Frankivsk ) Oblast, Tarnopil Oblast and Volyn Oblast.