221 BC
- Political
The First Emperor forges an empire

Via Wikimedia Commons Qin Shi Huang standardizes the script, coinage, weights and axle-widths, and divides China into centrally governed commanderies.
From the First Emperor's unification, the Great Wall and the Terracotta Army through the founding of the Han by a peasant, the golden age of Emperor Wu and the opening of the Silk Road, to the invention of paper and the fall of the Han before the warlords. Slide across the centuries to read the major events of China's first great empires.
Qin Shi Huang standardizes the script, coinage, weights and axle-widths, and divides China into centrally governed commanderies.
Qin Shi Huang standardizes the script, coinage, weights and axle-widths, and divides China into centrally governed commanderies.

Qin Shi Huang standardizes the script, coinage, weights and axle-widths, and divides China into centrally governed commanderies.
Around 221 BC
Accession of Ptolemy IV
Qin unifies all under Heaven
Outbreak of the Social War
Hannibal storms Saguntum
Hannibal crosses the Alps
Hannibal crosses the Ebro; Rome lands at Emporion
From the First Emperor's unification, the Great Wall and the Terracotta Army through the founding of the Han by a peasant, the golden age of Emperor Wu and the opening of the Silk Road, to the invention of paper and the fall of the Han before the warlords. Slide across the centuries to read the major events of China's first great empires.
Qin Shi Huang standardizes the script, coinage, weights and axle-widths, and divides China into centrally governed commanderies.
Qin armies drive back the Xiongnu nomads and link older ramparts into a single long wall along the steppe frontier.
The First Emperor dies seeking immortality and is buried with an army of thousands of life-sized terracotta soldiers.
The Qin collapses in revolt; the commoner Liu Bang triumphs in civil war and founds the Han dynasty as Emperor Gaozu.
Emperor Wu expands the empire in every direction and makes Confucianism the doctrine of the state.
The envoy Zhang Qian journeys into Central Asia, opening the trade routes that would carry Chinese silk to Rome.
The court historian Sima Qian completes the Shiji, the model for two thousand years of Chinese history-writing.
The regent Wang Mang seizes power and founds the short-lived Xin dynasty, attempting sweeping and disastrous reforms.
The court official Cai Lun perfects a cheap papermaking process, one of China's most far-reaching gifts to the world.
A vast peasant uprising shatters the dynasty's authority, and by 220 the last Han emperor abdicates as warlords carve up China.