This was the Beast Kings 'plan.
The news wasn't released at the same time. The news was carried out one by one in each city. The time and location of the surprise attack were different in each city.
In this case, as long as they sent people to pay attention to the situation at the border, they could see which area the humans would react to and when they would react. They could then lock onto which city had a traitor.
Moreover, the plans of all the City Lords were the same. The news did not reach everyone's ears, but reached the small captain. Even if it was leaked, not everyone would know in a short period of time.
This was also the reason why the spies that Moxiu had planted in the other cities did not give him any information.
The spies were all new to the organization, so the number of people they could come into contact with was limited. Their positions were not high, so it would be difficult to get any information.
