People were ready to submit to anything as long as their lives are threatened. That's why they were willing to do as the First Victor says during the time of their rescue.
However, people's greed knows no end until they themselves recognize that it is enough.
And so after asserting that they were no longer in a perilous situation, they started to move and bite the hand of the person who fed them.
The First Victor was enraged upon realizing the extent of the greed of the people he rescued.
However, there was a larger mission ahead that he desired to swiftly resolve the issue so that he could continue to reclaim the remaining continents.
And so he gave an order to his people that they must wait for the war to end before settling down the matter of the territories.