Unfortunately they had already begun spilling out from the tower, you can see one on the wall just right of the tower, and unfortunately I only had my persian archers there to hold them back, my pantopadoi phalangitai just nearby (whose banner is seen just to the left) were defending the wall from enemies climbing up the ladders. If the tower hadn't burned down I would have lost those persian archers and possibly my pantodapoi phalangitai...