They drove more Georgians to the patriots' side.
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".
The Nile River was predictable and flooded yearly. This allowed the Egyptians to build early irrigation systems and save the flood water for growing season, when they needed it most. It was their water supply and allowed them to transition from hunting and gathering to an agricultural production system. However, there was drought for a period of time and the Nile didn't flood. This again shaped their society as the pharoah was weakened and they were able to be conquered by nomads.
