By July 1943, the full extent of Hitler’s failed gamble in the East had become clear. After failing to deliver knock-out blows at Stalingrad and Moscow, his army was now at the mercy of the vast Soviet war machine. With its huge resources and seemingly limitless numbers of men, the Red Army slowly pushed the Germans back out of Russia through Ukraine, Poland, the Balkans and Hungary. This was war on a monster scale, pitching armies of millions against each other. But it was also a war fought by small bands of partisans, men like Tito in Yugoslavia, leading guerrilla bands against Nazi forces.