With the advance of the Red Army in the summer of 1944, the Danube region became a theater of military operations between German and Soviet troops, and the peoples of South-Eastern Europe were also involved in these actions in one way or another. The famous Hungarian historian Peter Gostoni highlighted the political and military events that took place in countries of the Danube region from August 1944 until the end of the war. As a result of many years of research work, analysis of combat logs of Army Group South, a number of interviews with former commanders and officers of Wehrmacht divisions, corps and armies, political and military figures of the Danube countries, study of a huge amount of memoirs and documentary sources, the author was able to present a realistic picture how the fate of not only the German Reich, but also the future of Romania, Bulgaria, Hungary, Yugoslavia and Czechoslovakia was decided in the Danube region.