The Aus Great Counteroffensive was a thorough failure, but it wasn't without gains.
"At least, we verified that these Exotic Realm Invaders are serious. They deployed heavy troops. Around the teleportation gate, there's not only a regular army but also a mass of Top Combat Power... in their words, that includes Overlords, King-level Life, and even Plane Rulers."
The Aus homeland fell too quickly, after all, no matter the timeline, the military strength of that region and kingdom were infamously weak and cruel.
Think of everything that happened on Green Planet... and regardless of which world line it is, their weapons and overall combat power could only be considered low-class.
After all, for the islands in that region, apart from playing with marine life due to the lack of a menacing navy from nearby Island Countries, could they really create a fleet of ships that wolves encircle the islands with?