If prior to this, Ganasis believed that this Han army could be taken down merely by relying on the Council Guard or the Teutonic Throwing Axemen, now he could assure that to take down this cavalry unit, it would definitely require an Imperial Guard Rank guard to accomplish the task!
As for other armies, they would absolutely be just sending themselves to their deaths. Ganasis had previously tried pressing in his General's Guard, yet even with the Eagle Banner raised, they could only be suppressed in battle. He estimated that it would take the support of the Empire's Eagle Banner to ensure an evenly matched fight.
By now, Ganasis no longer wished to fight. As long as the Iron Cavalry withdrew, he had no intention of pursuing; he has understood the difficulty of the opponent.
