Henry, meanwhile, had sent an army of some 40,000 men to Calais under the joint command of Thomas Howard, Duke of Norfolk, and Charles Brandon, Duke of Suffolk. While Henry continued to squabble with the Emperor over the goals of the campaign and his own presence in France, this massive army moved slowly and aimlessly into French territory. Finally, Henry decided that the army was to be split. Norfolk, ordered to besiege Ardres or Montreuil, advanced towards the latter; but he proved unable to mount an effective siege, complaining of inadequate supplies and poor organization. Suffolk was ordered to attack Boulogne; on 14 July, Henry crossed to Calais and moved to join him. A siege of Boulogne began on 19 July—despite the protests of the Emperor, who insisted that Henry should advance towards Paris.