If Darius was at the time when their marginalization from the center of squads if he, like Alexander, stood at the head of the attack and not be observed with a high chariots for battle, he would certainly have won the battle. Now the torn structure of Persian horsemen left at the right time without guidance. Rather than destroy the Macedonian army, disguised behind the remains fiercely defend the second tier, they rushed to the waggons Alexander, who was not far and attracted them to a possible rich booty. This is where they are and when Issa, lost precious minutes, so necessary to secure success. Parmenion, when he saw that surrounded, understood the danger of his position. He knew that Alexander on the other flank is preparing for a decisive attack, but feared that this time the king did not have time to come to his rescue. So he asked him for help.