Question

when did sparta demise

Answer 1

Explanation:

the defeat by thebes in the battle of leuctra in 371 BC ended Sparta prominent role ,throughout it maintain it political Independence until the Roman conquest of Greece in 146 BC

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Answer 2

When Sparta defeated Athens in the Peloponnesian War, it secured an unrivaled hegemony over southern Greece. Sparta's supremacy was broken following the Battle of Leuctra in 371 BC. It was never able to regain its military supremacy and was finally absorbed by the Achaean League in the 2nd century BC.