I would use spartan hoplites naturally, and some classical hoplites as well to represent sparta's allies that were present. I've never played that map, but make sure you have enough men to completely block the hot gates. Might want to give them some experience chevrons too. For the enemy I would use Pahlava. Throw a whole bunch of persian archer-spearmen, and parthian spearmen at them. Maybe choose some kind of elite infantry to represent immortals. It's not the easiest thing to do the whole battle, because there were so many phases to it. As for web sites, google Sparta and you'll be swimming in them. I couldn't tell you what the best ones are, I'd recommend reading a book though.
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