 The Soviets immediately began campaign of a large-scale mass terror, with hundreds of thousands of people deported to Siberia.The terror was mostly aimed at Polish professionals as well as their entire families.Creation of the White Couriers was directly connected with the Soviet terror, as hundreds of people, mostly from the city of Lwow, decided to escape Soviet Union across the Soviet-Hungarian border in Eastern Carpathians, which had been established as a result of Soviet and Nazi aggression of Poland.