The eighth day of Unternehmen Wacht am Rhein marked a critical turning point. Clear weather returned to the Ardennes for the first time since the offensive began, enabling over 2,000 Allied air sorties against German armour, supply columns, and lines of communication. The German High Command had formally shifted the Schwerpunkt to the 5. Panzerarmee, but fuel shortages and exposed flanks were already undermining the central advance.
Kampfgruppe Peiper ceased to exist as a fighting force–the last 800 men slipped out of La Gleize on foot, leaving behind all heavy equipment, 353 American prisoners, and 111 murdered civilians. At Bastogne, C-47 transports conducted the first aerial resupply to the besieged garrison, while P-47 Thunderbolts began ground attack missions. St. Vith fell at 22:30, eight days behind schedule.