how were tanks used in the battle of the bulge?

German soldiers who attempted to storm the 101st Airborne command post in Bastogne, Belgium, lie dead on the ground after they were mowed down by American machine gun fire. This dead Yank was felled while fighting with fellow soldiers of the 101st Airborne Division, to drive Nazis from a heavily wooded area near Bastogne, Belgium, where Germans were entrenched () || Photo By: Lynch. Painted white to blend with snow-covered terrain, an M-36 tank destroyer crosses a field. Lellig, Luxembourg || Signal Corps Photo #ETO-HQ-45-5003 (Hustead) Dudelange, Luxembourg. White bedsheets camouflage them in the snow. Three members of an American patrol cross a snow covered Luxembourg field on a scouting mission. First Army gather around a fire on the snow-covered ground near Eupen, Belgium, opening their Christmas packages (12/30/44) -5th Armd. A 7th Armored Division antitank gun covers the approach on a road to Belgium (12/23/44)-Railroad crossing near Vielsalm, Belgium. Members of the 630th Tank Destroyer Battalion, Company 'B', who lost their vehicles during advancement to Belgium, take Infantry positions on a hill covering an approach in Wiltz, Bastogne, Belgium (12/20/44) || Signal Corps Photo ETO-44-30382 (Carolan). Btry C, 702 TD Bn., 2nd Armored Division, tank destroyer on dug-in ramp has plenty of elevation to hurl shells at long range enemy targets across the Roer River.

How were tanks used in the battle of the bulge?