The primary suggestion I make does not consist of that many difficulties. Allow me to elaborate. For the Romans, the Marian reforms would only require one unit, which exists in game. Obviously a previous one could be introduced if possible, but even that is unnecessary. The Spartan reforms would be quite simple I should think. The Perioikoi could possibly become hoplite peltast hybrids at some point while the Spartiate would change from a hoplite to a pikeman. (Another unit which exists.)
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