The Watchtower's colossal volume had room for two full regiments of two thousand pegasi each, plus the headquarters and support units of the First Air Division. And those stalwart defenders could take off at a moment's notice to defend the capital from the three great and five lesser landing platforms that jutted out from the building, or sally forth from any of a dozen simpler portals. There were even arrow-slits for unicorn and earth pony defenders to fire missiles from, and the upper landing platform, facing away from the city, had been modernized to mount a battery of cannon as well.