 Demetrius left a garrison in the castle to control the city, and the commander Cleon established another tyrannical regime.After some twenty years he was killed by two rivals, Euthydemus and Timocleidas, who became the new joint tyrants of Sicyon.Their rule ended, probably around the start of the Chremonidean War in 267 BC, when they were expelled by the people who elected their leader Cleinias to govern the city on a democratic ground.