These annexed territories were subsequently incorporated into the Lithuanian, Byelorussian, and Ukrainian Soviet Socialist Republics and remained within the Soviet Union in 1945 as a consequence of European-wide territorial rearrangements configured during the Tehran Conference of 1943 (see Western Betrayal). Poland was "compensated" for this territorial loss with the pre-War German eastern territories, at the expense of losing it's eastern regions. The Polish People's Republic regime described the territories as the "Recovered Territories".