The retreating vanguard collided with the advancing division of the Duke of Orléans, throwing the French army into chaos. Seeing the Dauphin's troops falling back, Orléans' division fell back in confusion. The third, and strongest, division led by the King advanced, and the two withdrawing divisions coalesced and resumed their advance against the English. Believing that the retreat of the first two French divisions marked the withdrawal of the French, Edward had ordered a force under the Captal de Buch to pursue. Sir John Chandos urged the Prince to launch this force upon the main body of the French army under the King. Seizing upon this idea, Edward ordered all his men-at-arms and knights to mount for the charge, while de Buch's men, already mounted, were instructed to advance around the French left flank and rear.