The Spartan Empire, once a dominant force in ancient Greece, met its demise in the 3rd century BC due to various factors. Continuous warfare had depleted its military strength, and the empire suffered heavy losses at the Battle of Leuctra in 371 BC, weakening its hold on its conquered territories. Economic difficulties and social unrest within Sparta further contributed to its decline. The reforms of Cleomenes III in the late 3rd century BC attempted to revive the empire's military prowess and alleviate social tensions, but they ultimately proved insufficient to prevent the collapse of the Spartan Empire. By the 2nd century BC, Sparta had lost most of its power and influence, and it eventually became a minor player in Greek politics.
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