The <a href="https://en.wikipedia.org/wiki/Athenian_coup_of_411_BC" id="mwEQ" rel="mw:WikiLink" title="Athenian coup of 411 BC">Athenian coup</a> succeeds, forming a short-lived <a href="https://en.wikipedia.org/wiki/Oligarchy" id="mwEg" rel="mw:WikiLink" title="Oligarchy">oligarchy</a>.