The fifteenth day saw counter-offensive preparations accelerate. Following the inability of German troops to cross the Meuse, Bastogne became the main strategic target. Hasso von Manteuffel launched an attack against the city, which resulted in failure. The Germans again attempted to cut the Arlon–Bastogne highway, reaching Lutrebois and surrounding two companies of the 137th Infantry Regiment at Villers-la-Bonne-Eau. The Germans abandoned Rochefort.
General Hodges held a major two-and-a-half-hour conference with Generals Ridgway and Collins to finalise counter-offensive plans. VIII Corps opened its drive on Houffalize. The area southwest of the Marche–Namur line was turned over to the British.