The two-front war Russia never wants to fight. Here's What You Need To Remember: Fighting a one-front war was the Soviet Union's greatest advantage. Fighting a war on two fronts is the military equivalent of driving a car while texting. It’s just a really bad idea, as Germany can attest. One reason Germany lost two world wars is because its forces were split between East and West. America and Britain also fought World War II in Europe and Asia. In contrast, the Soviet Union could concentrate its forces against Germany, thanks to a 1941 neutrality pact with its long-time rival Japan. This became painfully obvious to Hitler during the 1941–42 Battle of Moscow, when the Red Army’s well-trained and well-equipped Siberian divisions reinforced the battered Soviet armies defending Moscow. Trained to operate in the harsh cold of Siberia, these fresh troops shattered the frozen German spearheads and sent them reeling from the gates of Moscow.