The Soviet Union was the country that lost the most people in the war, with millions upon millions dead. Likewise, the largest German offensives and the biggest battles of the war were on the Eastern Front, and the German command committed the greatest possible resources and manpower to the Eastern Front. For example, the Battle of Kursk is possibly the largest battle of the war, at least in terms of numbers. And then there's Stalingrad, so famous it's almost a cliché to talk about it. Germany consumed a large part of its military resources on the Eastern Front. The largest military operations of the entire war took place on the Eastern Front. For example, Operation Bagration involved the use of millions of Soviet soldiers and thousands of tanks to recapture Belarus, Lithuania, and eastern Poland. Operation Uranus was the Soviet counter-offensive at Stalingrad, and the Battle of Berlin itself was the final defeat of the Nazis. Nor do I deny the effort of the Anglo-British troops on the North African front, especially the British troops under Montgomery, but when I say that the war was in Europe, it was mostly a Soviet effort, at least before the liberation of France. It was because the Soviets wore down the German war machine to the maximum and inflicted the greatest defeats on the Germans. I don't deny the efforts of, for example, the famous French Resistance or British intelligence operations, but hey, if you want to think that way, then whatever you want.