Aratus of Sicyon

Aratus led a small group of exiles to capture the Acrocorinth and overthrow the tyrant Nicocles of Sicyon. This restored democracy to Sicyon and brought the city into the Achaean League, beginning Aratus's rise as a leader.

Aratus led a night raid to seize the fortress of Acrocorinth from the Macedonians. This strategic victory brought Corinth into the Achaean League and significantly expanded its influence, challenging Macedonian dominance in Greece.

Facing the military reforms of Cleomenes III of Sparta, Aratus allied the Achaean League with Antigonus III Doson of Macedon. This alliance, though controversial, saved the League from Spartan conquest but subjected it to Macedonian influence.

Aratus fought alongside Antigonus III Doson at Sellasia against Cleomenes III. The allied Macedonian-Achaean army defeated the Spartans, ending Cleomenes' reforms and forcing him into exile, securing the League's survival.

Aratus commanded the Achaean League forces against the Aetolian League and Spartans at Caphyae. The Achaeans were decisively defeated, leading to widespread devastation of their territory and a crisis for the League.