Roman Empire:
753 BC: Traditional founding of Rome
509 BC: Roman Republic established
27 BC: End of the Roman Republic, beginning of the Roman Empire
117 AD: Height of the Roman Empire under Trajan
476 AD: Fall of the Western Roman Empire
Greek Empire:
776 BC: First Olympic Games
508 BC: Athenian democracy established
431-404 BC: Peloponnesian War
336-323 BC: Reign of Alexander the Great
146 BC: Greece becomes a Roman province
Mauryan Empire:
321 BC: Chandragupta Maurya becomes emperor
273 BC: Ashoka becomes emperor
261 BC: Kalinga War
185 BC: End of the Mauryan Empire
Gupta Empire:
320 AD: Gupta Empire founded by Chandragupta I
375-415 AD: Reign of Samudragupta, the Gupta Empire's greatest ruler
455 AD: Fall of the Gupta Empire
Qin and Han Empires:
221 BC: Qin Empire founded by Qin Shi Huang
206 BC: Han dynasty established, end of the Qin Empire
141-87 BC: Reign of Emperor Wu of Han, considered the greatest Han emperor
220 AD: End of the Han dynasty, beginning of the Three Kingdoms period