Answer:
The Tang Dynasty, which ruled China from 618 to 907 CE, conquered Vietnam, and made it the southernmost province of China.
Vietnam, up until that point, had been a problematic place for China, even it it was much smaller. The Tang Dynasty was able to conquer the area, and integrate into the central bureacuracy of the Empire, this is why they began to referred to Vietnam as the "pacified south".
It's kinda like an educated guess.
The fact that the constitution gave too much power to the federal government, and that the rights of the people were not guaranteed in the bill of rights.
Ppl are still dancing but umm really nothing changed
