What is the fundamental change in the course of the Great Patriotic War?

It was the Battle of Stalingrad that changed the course of the Great Patriotic War. Thanks to her, from November 1942 to November 1943, there was a turning point in the war. Thanks to the successful offensive operation “Uranus”, which came as a complete surprise to the German army, the troops of the USSR went over from defense to offensive. The defeat of the Germans at Stalingrad led to the undermining of their morale, the liberation war intensified in the occupied countries of Europe, the rise of the USSR on the world stage (conference in Tehran in 1943).