sentences:  However, the muddy road and mines prevented the Americans from bringing their tanks into both towns to support the infantry.As a result, after some determined German counterattacks on Schafberg, the American units in Strass were effectively cut off and had to be supplied by aircraft, while the Germans started several attacks on the town.Schafberg was retaken on 12 December and tanks reached Gey and Strass, easing the situations.