The document summarizes key events of the Russo-German War from 1941 to 1945. It describes Operation Barbarossa in June 1941, where 3 million German soldiers invaded the Soviet Union, making large gains initially. However, the brutal Russian winter of 1941-1942 caused heavy German losses. The Battle of Stalingrad from 1942-1943 marked a major turning point, where the entire German 6th Army was surrounded and captured by Soviet forces. For the next two years the Germans were pushed back by Soviet counteroffensives, until Russian forces entered Germany itself by 1945 seeking revenge.