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 most economic event was the civil war i hope this helps
Aqueducts <span>were used by the Roman Empire to supply its urban citizens with fresh water from far-off places.
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<span>FULL ANSWERThe Russian revolution actually included two separate revolutions, both in 1917. First, the February Revolution grew out of food riots in the city of Petrograd, now St. Petersburg. When the armed forces were called out to quell the uprising, many of the soldiers defected, forcing Czar Nicholas to abdicate and dissolving the imperial government. Eventually, revolutionaries executed the czar and his family, putting an end to aristocratic rule in Russia. The October Revolution saw Lenin and the Bolsheviks come to power, and they soon signed a peace treaty with Germany. Allied powers supported the anti-Bolshevik factions in Russia in an attempt to bring the country back into the war, but the Bolshevik Red Army faction ultimately prevailed. This costly civil war, in which as many as 10 million people perished, became the cornerstone of Soviet mythology as a tale of their ideological purity in the face of opposition and manipulation by the West and drove much of Soviet policy for decades.</span>
