Q- When and how did Hitler invade Soviet Union?
Answer- In 1940, Hitler was at the pinnacle of his power and now he moved toward Eastern Europe, after defeating France in the west he attacked the Soviet Union in June 1941. In this historic blunder, Hitler exposed the German western front to British aerial bombing and to the eastern front to the powerful Soviet armies.
The Soviet Red Army inflicted a crushing and humiliating defeat on Germany at Stalingrad. After this, the Soviet Red Army inflicted a crushing and humiliating defeat on until they reached the heart of Berlin, establishing Soviet power over the entire Europe for half a century.