8 hours ago, TheItsyBitsySpider said:They mention that the wall has been hit earlier and is still in repairs, spreading the Kaiu thin and making a siege less viable due to needed repairs, as such the crab hold the forces in place while the siege engines ready a bombardment.
The wall wasn't secure enough for a siege, so they engaged them on the field rather then risk the wall, trading lives for time.
In the old fluff, breaching the outer wall was just the start of the pain. The intricacy and extensiveness of the traps within made safe travel through require a Kaiu guide.