The aftermath was brutal.
Even after killing the king, the remaining defenders continue to fight against the Demon Horde due to the lack of information being passed around. Still, it did not take long for the rest to finish the job and finally call it a day. Some even felt that they should done this a long time ago then to adhere to proper military conventions.
After all, which 'demon' horde would follow such strict discipline rather than to rampage? But the casualties that they suffered were undoubtedly more than expected since every single monster had been given the order to just rush and flood the entire city with numbers. It was to the point where there were friendlies who were killed because of the stampede rush that they had done. This was especially true for the giants and large trolls who had been moving around, impeded by the stampede since they were the ones causing the unnecessary killing of their friendlies due to their size.