S1, E2: The Allies win a great victory at Amiens. The tide is turning but there are no illusions -- the battle to control Europe is just getting started. The German Army remains a daunting fighting force and it has an ace up its sleeve: the Hindenburg Line -- the most formidable defensive system in military history. If the Allies have any hope for victory, they'll need to find a way to punch through Germany's wall of steel.