The aquatic beasts were like a massive nuke that exploded in the human world. After hearing about this, countless people were incredibly horrified.
Akhenaten immediately started requesting for help because he could not face a beast tide of millions of aquatic beasts by himself. They needed at least 600 million to 700 million Stage 1 soldiers to put up a decent resistance, and even then, there would be many casualties.
Facing this massive crisis, everyone in the Southern Continent responded to Akhenaten's requests for help. Even the system main city City Lords were no exception, as they had personally gone to see the beast tide, forcing them to work together with the players.