In late December, the regiment was rushed into the Battle of the Bulge. On January 28, 1945 Megellas' platoon was advancing towards Herresbach, Belgium. Struggling through heavy snow and freezing cold, they surprised 200 Germans who were advancing out of the town. Catching the Germans largely off-guard, the attack proved to be devastating, with the Americans killing and capturing a large number and causing many others to flee. As they prepared to assault the town, however, a German Mark V tank took aim at them. Megellas ran towards it, and disabled it with a single grenade. Climbing on top of it, he then dropped another grenade into the tank, eliminating the threat to his men. He then led his men as they cleared and seized the town, and not one of his men was killed or injured. Although he was recommended for the Medal of Honor shortly afterward, he received the Silver Star (the German tank incident was not mentioned in his award citation).