Demetrius, having kept a foothold in Greece,…
294 BCE
Demetrius, having kept a foothold in Greece, conquers most of the peninsula in 294, defeating Archidamus IV of Sparta, son of Eudamidas I, grandson of Archidamus III, in a battle at Mantineia.
Sparta is saved only because Demetrius is called away by the threatening activities of his rivals Lysimachus and Ptolemy.