No one knew that, but the real headquarters of the enemy commanders weren't located in either of those three camps. They were several kilometers away from the army closest to the eastern gate. They knew that Jean's best chances of winning the war would be by taking their heads, so they took the necessary precautions to prevent that. In any case, when they heard of what had happened, they sent the order for the other troops to retreat as well. Once the defenders listened to what had happened, their morale would be sky-high, so dealing with them would be troublesome.
"Explain to me how that was possible,"