After 9 September 1944, the Bulgarian Army joined the Third Ukrainian Front and contributed to the defeat of Nazism in Europe, helping drive out the Germans from much of Yugoslavia and Hungary, reaching as far as Klagenfurt in Austria by April 1945. Although Bulgaria was not recognized as a true member of the Allies, it still managed to retain Southern Dobruja which it had acquired in 1940 per the Treaty of Craiova.