Having a short experience with the game, still finished a KH campaign and always taking advantage of Agoge.It produced better generals but to exploit their full potential a certain amount of your intervention is needed.For example those with the Clerk retinue, would make great governors, or take advantage of the deity trait (make him govern in a certain city where the deity's temple exists), or more military oriented characters (Spear carrier retinue) giving them battles, etc
Googling around found this:
https://img503.imageshack.us/f/agoge1lz0.gif/
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