Macedonian intervention
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Was a Macedonian military campaign against Sparta during the Cleomenean war.
Chronology
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January 222 BC: Cleomenes of Sparta conquers Megalopolis.
January 222 BC: In the early spring of 223 BC, Antigonus advanced upon Tegea. He was joined there by the Achaeans and together they laid siege to it. The Tegeans held out for a few days before being forced to surrender by the Macedonians' siege weapons.
January 224 BC: Antigonus sent 1,500 men under the command of Aratus to sail to Epidaurus and, from there, he marched to Argos.
January 222 BC: Antigonus of Macedonia proceeded to capture Mantinea, Heraea, and Telphusa, which confined Cleomenes to Laconia.
September 222 BC: The Battle of Sellasia took place during the summer of 222 BC between Macedon and the Achaean League, led by Antigonus III Doson, and Sparta under the command of King Cleomenes III. The battle was fought at Sellasia on the northern frontier of Laconia and ended in a Macedonian-Achaean victory. Antigonus' army occupied Sparta.