The death of a Celestial Demon marked the end of resistance in the Southern Province.
Wherever the West Continent's army went, all Demon Clans surrendered.
It couldn't be helped; after the royals among the demons, the Phoenix Clan, led the way in surrendering, why should these smaller tribes continue their futile resistance?
It was nothing more than changing allegiances, simply switching one boss for another—hardly worth mentioning.
The intimidation from the fall of a Celestial Demon played a part, but the rapid submission of the Southern Province was primarily due to disunity among the Land Demon Clan.
The moral failure of the Descendants of the Phoenix to unite the Land Demon Clan was the main reason.
When people's hearts are not in alignment, such a situation naturally arises.