Some historians have thought that the gap could have been closed earlier; Wilmot wrote that despite having British divisions in reserve, Montgomery did not reinforce Guy Simonds and that the Canadian drive on Trun and Chambois was not "vigorous and venturesome" as the situation demanded. The British author and historian Max Hastings wrote that Montgomery, having witnessed what he called a poor Canadian performance during Totalize, should have brought up veteran British divisions to take the lead. D'Este and Blumenson wrote that Montgomery and Harry Crerar might have done more to impart momentum to the British and Canadians. Patton's post-battle claim that the Americans could have prevented the German escape, had Bradley not ordered him to stop at Argentan, was "absurd over-simplification".