Later, the Germans were pushed back to the Ruhr and, after the war Blumentritt disagreed with the Allies′ strategy in the west, discussing the precarious nature of the German position with its meager one armoured division against the twelve of the Allies, and he stated that had Field Marshal Bernard Montgomery's Anglo-Canadian 21st Army Group been unleashed earlier for a concentrated armoured assault (as he had wished) rather than fighting on a broad front, "Such a breakthrough ... would have torn the weak German front to pieces and ended the war in the winter of 1944."