Which part of the former Soviet Union is sandwiched between the Ukraine and Romania?
Romania–Ukraine border the Eastern Carpathians. The southern part stretches roughly west-east from the southern Moldova-Romania-Ukraine tripoint to the maritime Romania-Ukraine boundary. It runs along the Danube River, its Chilia branch of its delta to the Black Sea. The border is mostly inherited from the Romania-Soviet Union border, with some border disputes, most notable being the Snake Island issue. On 4 July 2003 the President of Romania Ion Iliescu and the President of Russia Vladimir Putin signed a treaty about friendship and cooperation. Romania promised not to contest territories of Ukraine or Moldova, which it lost to Soviet Union after World War II,
Population exchange between Poland and Soviet Ukraine Population exchange between Poland and Soviet Ukraine The population exchange between Poland and the Soviet Ukraine at the end of World War II was based on a treaty signed on 9 September 1944 by the Ukrainian SSR with the newly formed Polish Committee of National Liberation (PKWN). It affected an estimated 1.6 million people. The transfer (which took place in 194446) became part of a mass movement of people expelled from their homes in the process of ethnic consolidation throughout nations of Central and Eastern Europe. The new border between postwar Poland and the Soviet Union along the Curzon Line