A: You can build City Walls to fortify the city's defense. Build the Watchtower to scout for enemy info and know in advance of incoming attacks. Build Storehouse to store and shelter more resources. Constructing the General Hall allows you to recruit Generals and gain more Skill Points to upgrade your Generals. Build the Great Hall to manage your own army. Most importantly, you will need to develop the Castle as all the other buildings in the city rely on the level of the Castle.