 Complete the following phrase:  The Soviet authorities who occupied the Polesie Voivodeship dismantled the Polish administration and formally annexed what became known as West Belarus into the Soviet Union, dividing it between the Ukrainian Soviet Socialist Republic and the Byelorussian Soviet Socialist Republic Polesia Voblast. Following the Tehran Conference of 1943, Joseph Stalin insisted in 1945 on redrawing Polands borders with Western approval. The Soviets 