Yusuf Zuck was not immediately tasked with expanding territory but with defense because the Heaven One Gate would undoubtedly use a human wave tactic to attack Dragon City. At that time, even if Yusuf Zuck had three heads and six arms, he wouldn't be able to eliminate all invading enemies. People would still reclaim Dragon City, making his idea of establishing an Empire a laughingstock!
Therefore, fortifying the city is the first step.
But how to fortify the city?
Of course, build Dragon City as strong as an iron barrel, so that even if thousands of enemies attack, the city will remain safe. This way, a temporary Empire will take root.
Additionally, a massive recruitment of soldiers is necessary, which requires provisions, addressing a substantial practical problem.
Establishing an Empire isn't something that can be done just by saying it; you must take care of all aspects. Simply put, whether an Empire can be established depends on the sufficiency of your provisions.
