In the treaty , both sides committed themselves to nonviolence and accepted the existing border — the Oder-Neisse line , imposed on Germany by the Allied powers at the 1945 Potsdam Conference following the end of World War II . This had been a quite sensitive topic since then , as Poland was concerned that a German government might seek to reclaim some of the former eastern territories . From the Polish perspective , the transfer of these regions was considered to be a compensation for the former Polish territory east of the Curzon Line ( " Kresy " ) , which had been annexed by the Soviet Union in 1939
Potsdam Conference
Potsdam Conference
Treaty of Warsaw (1970)