American armored divisions push into Germany's western defenses in this episode of Greatest Tank Battles, tracing the fight to crack the Siegfried Line, the belt of bunkers, dragon's teeth obstacles, and minefields built to stop any invasion of the Reich. Archival combat footage and battlefield maps trace Sherman crews facing German defenders fighting on their own soil, backed by some of the heaviest Panzers fielded in the war, including Tiger and Panther units dug into prepared positions. Historians and military analysts break down the tactics on both sides, from American attempts to outmaneuver fixed fortifications to German efforts to bleed the advance street by street and pillbox by pillbox. The episode treats the campaign as a turning point where the war shifts from liberation to a grinding fight over German territory itself, with tank crews absorbing heavy losses against an enemy with nothing left to fall back to. Reenactment-style footage and period photographs fill in scenes where combat film does not survive.