While other forces had not yet received related messages and were blushing and bickering over another ownerless Territory, Zhang San and Bella, following Zhou Tian's orders, led their massive Monster force to invade that nearby ownerless Territory.
With the strength of Zhou Tian and the other two Domain powerhouses, it was irrelevant that Zhou Tian had already eliminated the King Level Boss in advance. Even if the King Level Boss hadn't been taken out, given the situation at the time, it still wouldn't have been a match for them, and for Zhou Tian and his allies, annexing that King Level Boss's Territory would have been completely problem-free.