Under orders of Joseph Stalin the Soviet Union carried out a forced transfer of various groups before, during and after World War II (from 1930s up to the 1950s). During the June deportation of 1941, after the occupation of the Baltic countries, Eastern Poland and Moldavia, as was agreed by the Soviet Union and Nazi Germany in the Molotov–Ribbentrop Pact, in an attempt to subdue the countries for their forced incorporation into the Soviet Union, the Soviet Union deported tens-of-thousands of innocent people to Siberia.