Deported Polish families load onto trains to Siberia in Eastern Poland during the Soviet occupation of Kresy in World War II. First wave of mass deportations began on the night of 9 February 1940. The second, on 13 April 1940. The third, on 29 June 1940. And the final fourth one, between May and June 1941. The cumulative number of Polish nationals extracted from their homes and sent to Soviet no-mans land with nothing to live on exceeded 1,600,000.