 In 369 BC Sicyon was captured and garrisoned by the Thebans in their successful attack on the Peloponnesian League.From 368 to 366 BC Sicyon was ruled by Euphron who first favoured democracy, but then made himself tyrant.Euphron was killed in Thebes by a group af Sicyonian aristocrats, but his compatriots buried him in his home town and continued to honour him like the second founder of the city.