Cleomenes III vs King Min of Qi

Cleomenes III initiated a war against the Achaean League to restore Spartan hegemony in the Peloponnese. He won several battles, including the Battle of Mount Lycaeum and the Battle of Ladoceia, capturing many cities and expanding Spartan territory.

Cleomenes III implemented radical reforms to revive Sparta's military strength. He abolished the ephorate, redistributed land, cancelled debts, and expanded the citizen body by enfranchising perioeci and helots. These reforms aimed to restore the Lycurgan system.

Cleomenes III was decisively defeated by the combined forces of the Achaean League and Macedon under Antigonus III Doson at Sellasia. He fled to Egypt, and Sparta was forced to join the Hellenic League, ending his reforms and Spartan independence.

Cleomenes III was exiled in Egypt under the protection of Ptolemy III. After Ptolemy's death, he was placed under house arrest by Ptolemy IV. He attempted to lead a revolt in Alexandria, failed, and committed suicide.

King Min of Qi declared himself 'Eastern Emperor' (Dongdi) while King Zhaoxiang of Qin declared himself 'Western Emperor' (Xidi). This unprecedented claim to imperial titles angered other states and isolated Qi diplomatically.

King Min of Qi conquered the Song state, one of the remaining major states of the Warring States period. This expansion alarmed the other states and led to the formation of a coalition against Qi.

A coalition of Yan, Zhao, Wei, Han, and Qin forces invaded Qi under the command of Yue Yi. The coalition captured the Qi capital Linzi and most of Qi's territory. King Min fled and was later killed by the Chu general Nao Chi, ending his reign.