Stalin's Russian Winter War against Finland, and his World War II campaigns on Nazi Germany's eastern front (around Kiev, Lenningrad, Moscow, Kharkov, Stalingrad, Kursk, Byelorussia, the Balkans, East Prussia, Warsaw, Hungary, and Berlin) constitute the largest land war in world history in terms of the number of troops engaged, and is also impressive in terms of the vast distances fought over. Russia took 20 million military and 20 million civilian...