sentences:  Later (14 until 26 January 1945), the Roer triangle was cleared during Operation Blackcock and only in February 1945 were the Allies finally able to cross the Rur, by then the road to the Rhine was clear.However, the Ardennes offensive also showed the lack of any long-term strategic perspective for Germany.The superiority of the Allies in numbers of men and equipment could not be overcome by Germany.