The Orca Revolution swept through a significant part of the 3 Great Seas that were attacked like a storm, leaving behind a lot of destruction.
Of course, with the presence of the hot-blooded Pugilist King, the Orcas did not dare to be too overbearing in the Hot Realm. Their main motive of attacking 3 Great Seas at the same time was to prove a point to the world.
During the rise of the current overlord, the Atlantis Empire, once the variant humans consolidated their power and started their conquest, they were not modest at all as they flexed their might to all of Oceania.
By setting their sights on the Origin Peak Sea which was the territory of the strongest Sea King at the time and winning, they indeed proved a point.
The opponent that they went up against and won against was the main reason why Atlantis was recognized worldwide as the overlord of Oceania.