সঠিক উত্তর হচ্ছে: ২২ জুন, ১৯৪১
ব্যাখ্যা: Operation Barbarossa, original name Operation Fritz, during World War II, code name for the German invasion of the Soviet Union, which was launched on June 22, 1941. The failure of German troops to defeat Soviet forces in the campaign signaled a crucial turning point in the war. Source: britannica.com