These territories were re-annexed by the Soviet Union in 1939 under the Molotov - Ribbentrop pact .
These territories were include major cities , like Lviv ( Ukraine ) , Vilnius ( the capital of Lithuania ) , and Hrodna ( Belarus ) .
These territories were re-annexed by the Soviet Union in 1939 under the Molotov - Ribbentrop pact , and include major cities , like Lviv ( Ukraine ) , Vilnius ( the capital of Lithuania ) , and Hrodna ( Belarus ) .