In major military conflicts, logistics matters are often crucial in deciding the overall outcome of wars. For instance, tonnage war - the bulk sinking of cargo ships - was a crucial factor in World War II. The successful Allied anti-submarine campaign and the failure of the German Navy to sink enough cargo in the Battle of the Atlantic allowed Britain to stay in the war and establish the second front against the Nazis; by contrast, the successful U.S. submarine campaign against Japanese maritime shipping across Asian waters effectively crippled its economy and its military production capabilities. In a tactical scale, in the Battle of Ilomantsi, the Soviets had an overwhelming numerical superiority in guns and men, but managed to fire only 10,000 shells against the Finnish 36,000 shells, eventually being forced to abandon their heavy equipment and flee the battlefield, resulting in a decisive Finnish victory. One reason for this was the successful Finnish harassment of Soviet supply lines.