The Sea Route 2

On the other side, Emperor Kutu was far less ostentatious than Jusen. Apart from his Epic silks, which could even be alluded to his own wealth, he had invested the abundant money his empire had earned from the trade to expand the military power of the Huhan Empire. 

Jusen didn't dare act out of order on the Cario Continent because most of the unclaimed Area Zones were full of powerful monsters, and the claimed ones had capable powers. Not to mention that the Continental Council suppressed inter-Area Zone wars between two established factions. 

Of course, Vita was exempt from this as it was not only a player Kingdom, but also had a lot of favor. The AI knew players were war hungry and would need to seize resources from others in order to grow, so Kingdom Wars had been added in the last Update.