In Korolya, he married and had children locally, mixed in local Korolya soldiers into the legion, and took control of the legion in the capacity of a commander of the warzone...
All these efforts were made by Gu Hang in order to assimilate the Dragonhawk 3rd Corps.
Moreover, in the past few years, Gu Hang has been doing two more things:
First, he started replacing officers in the corps who were clearly inclined towards the Fatches Family.
Previously, he had done so in a more gentle manner, and he faced significant resistance. After all, General Hans was only a military subordinate to Gu Hang and had no political personnel authority.
However, once the news of the Fatches Family's rebellion came out, Gu Hang suddenly had far fewer scruples. He began to forcefully purge within the Dragonhawk 3rd Corps under the guise of removing 'the claws and teeth of imperial traitors,' reducing the resistance substantially.