Indeed, after Zhou Tian casually annexed several monsters, some other monsters at that time, fearing Zhou Tian's performance, even went so far as to defect as a clan.
There were monsters that forcibly resisted Zhou Tian's invasion. However, the monsters that made such a response without exception, all ended up perishing from the world. Given the strength exhibited by Zhou Tian, it would be very difficult to repel him unless several dozen masters gathered again to resist his invasion.
It was difficult to find so many masters willing to take action against Zhou Tian at that time. Even if they could contact that many masters, by that time, the time it would take for those monsters to contact those masters would be enough for Zhou Tian to overwhelm them all.
