The Lelantine Plain (Ancient Greek: Ληλάντου πεδίον or Λήλαντον πεδίον; Modern Greek: Ληλάντιο πεδίο) is a fertile plain on the Greek island of Euboea, between Chalcis and Eretria. In the late eighth century BC a dispute over its possession was the cause of the Lelantine War. In the Middle Ages it was known as Lilanto; a Venetian document from 1439 describes a crisis caused by the powerful taking more than their share of the irrigation water: