331 BC · Megalopolis, Greece
While Alexander was in Asia, his regent Antipater crushed the Spartan revolt of Agis III — the last stand of Spartan independence.
With Alexander deep in Asia, Agis III of Sparta saw his moment. Persian money reached him after Issus, and he raised a coalition of Peloponnesian states against Macedonian rule while the king was too far away to answer.
Sparta had stayed out of the League of Corinth and had never accepted Macedonian hegemony. This was its attempt to undo it.
Megalopolis, an Arcadian city founded expressly to contain Sparta, refused to join and was besieged. Antipater, Alexander's regent in Europe, came south with a much larger army and forced the battle there.
The fighting is described as long and hard. Agis was wounded, kept fighting on foot, and was killed covering the retreat; the Spartan line broke and the coalition dissolved with him.
Megalopolis ended Spartan independence as a political fact. Sparta survived as a city but never again led a coalition against a great power, and Alexander is said to have dismissed the whole affair as "a battle of mice".
The scenario is a last stand with real teeth: Sparta is outnumbered but not outclassed, and Macedon has to convert its advantage before the quality of the Spartan line makes the exchange too expensive.
The sides, the commanders and the outcome are historical. The cards, costs and turn structure are the game's own.