Sellasia

in ancient Greece, a fortified settlement north of Sparta. In 222–221 B.C, a battle took place near Sellasia between the Spartans, led by King Cleomenes III, and a Macedonian army, headed by Antigonus III. As a result of the Spartan defeat, Sellasia was destroyed, Laconia was included in the Hellenic League under the hegemony of Macedonia, and an oligarchy was reestablished in Sparta.