United States Region, former capital of the Calamity Dynasty... Lordaeron Imperial City.
With the assistance of the many newly surrendered heroes—especially since five of the six great hero nations had submitted, leaving only the Divine Tomb Empire, whose Emperor Realm ruler had died and whose divine city had collapsed, unable to organize any effective resistance—the Great Huan Expeditionary Army swept across the United States Region at astonishing speed. In just ten days, it had unified the United States Region, one of the world's five greatest powers.
Yet rather than calling it a campaign of conquest, it would have been more fitting to call it a takeover and a notification.
During the first three days after the decisive battle on the plains ended, the Great Huan Expeditionary Army merely dispatched representatives to tour and inspect the five great nations, announcing that the five hero nations had officially been incorporated into the territory of the Great Huan Celestial Dynasty. The former designation of the Five Great Hero Nations was abolished and changed to the Five Great Hero Factions, giving those hero citizens time to prepare themselves mentally and alter their mindsets and attitudes.
Within the Great Huan Celestial Dynasty, the hero armies, including the Calamity Dynasty, were collectively known as the Hero Factional Bloc. This was also a rule everyone had tacitly accepted beforehand; after all, Celestial Dynasty-level powers were simply too vast and too complex.
Three days later, the five newly surrendered factions joined forces to besiege the panicked, hollow, and chaotic Divine Tomb Empire. They took the Divine Tomb Empire in merely four days. Even "sweeping everything before them" was insufficient to describe the speed of the conquest—it was truly like a storm sweeping through. The cities of the Divine Tomb Empire surrendered at the mere sight of the enemy,