Corcyra was a Greek city-state on the island of Corfu that existed during ancient times. It was founded as a Corinthian colony in the antiquity period, but, by the 430s BC, Corcyra had entered into conflict with Corinth over control of Epidamnus. In 433 BC, Corcyra and Athens allied against Corinth and fought against the Corinthian navy at the Battle of Sybota, which led to the Peloponnesian War. In 427 BC, the pro-Athens democrats and the pro-Corinthian aristocrats fought in a civil war, but, with Athenian assistance, the democrats crushed the aristocrats and slaughtered their enemies. In 295, the tyrant of Syracuse conquered Corcyra, and it was conquered by Epirus in 274 BC. After the death of Alexander II of Epirus in 255 BC, Epirus regained its independence. In 229 BC, the Illyrians conquered Corcyra, but the Romans almost immediately intervened and conquered the island for themselves, turning it into a protectorate. This ended Corcyra's independence.