Political Ancient Greek Events By marionab 1250 BCE The Trojan War 650 BCE The Rise of the Greek Tyrants 560 BCE Pisistratos became a Tyrant 508 BCE Cleisthenes established democracy 462 BCE Pericles introduced democracy institutions 460 BCE First Peloponnesian War 431 BCE Second Peloponniesan War 371 BCE Thebes is the dominant city-state 336 BCE Alexander the Great reigns Greece 146 BCE The Roman Invasion