1. Operation Barbarossa: The initial German invasion of the Soviet Union in June 1941. The Germans made significant advances in the early stages, capturing large areas of territory and inflicting heavy casualties on the Red Army. However, the Soviets eventually halted the German advance and began to push back.
2. The Battle of Stalingrad: This battle was one of the largest and bloodiest in history, with an estimated 2 million casualties. The Soviets eventually emerged victorious, and this victory is considered to be a major turning point in the war.
3. The Battle of Kursk: This was another massive battle, with over 3 million casualties. The Soviets again emerged victorious, and this victory is considered to be the final turning point in the war.
4. Operation Bagration: This was a Soviet offensive that began in June 1944. The Soviets achieved a decisive victory, liberating Belarus and much of Poland. This offensive marked the beginning of the end for the German army.