Let's please stop talking about the ASD related syndromes, except in the designated thread. Having just watched a movie on Autistic children (called, funnily enough, Autism: The Musical), it is not a designation to be tossing lightly back and forth. It is very serious and can truly complicate people's lives.
About EU:Rome. Troops are levied similar to EU, where you build them. Only certain provinces can build certain troops, depending on what resource a province has. Thus, if you have Iron, you can make heavy infantry, with wood, Ships and Archers. All provinces have one type of resource, but you can trade this resource via trade routes to three other provinces (at least Rome can, so many it is trade tech related). These trade routes bring money and also bring the special benefit of the good (adds to buildables, gives pop growth, lowers revolt risk).
"Neca eos omnes. Deus suos agnoscet!"
(Kill them all. God will know his own.)
-- Arnaud-Armaury, the Albigensian Crusade