The battle for Moscow was the biggest battle of World War II -- the biggest battle of all time. And yet it is far less known than Stalingrad, which involved about half the number of troops. From the time Hitler launched his assault on Moscow on September 30, 1941, to April 20, 1942, seven million troops were engaged in this titanic struggle. The combined losses of both sides -- those killed, taken prisoner or severely wounded -- were 2.5 million,...