<answer>Sparta</answer> remained independent, but it was no longer the leading military power in the Peloponnese. The <answer>Sparta</answer>n king Cleomenes III (235–222 BCE) staged a military coup against the conservative ephors and pushed through radical social and land reforms in order to increase the size of the shrinking <answer>Sparta</answer>n citizenry able to provide military service and restore <answer>Sparta</answer>n power. <answer>Sparta</answer>'s bid for supremacy was crushed at the Battle of Sellasia (222) by the Achaean league and Macedon, who restored the power of the ephors.
Who was defeated at the Battle of Sellasia?
Sparta