[Mad Gus]

First off, I'm a newbiew. I'm currently playing my second game. Do AI nations raise armies the same as human players? Or are they just given armies. I am asking because in my current game the Jotun nation was moving on me with some sizable forces. We fought for several turns and we both lost the majority of our forces. A turn or two later he now has 3 provinces containing with 70-90 troops. I read another post on how the AI seems to go with cheap units but wouldn't he be hampered by resource restrictions just like me? I don't have a problem with the computer "cheating", I was just curious.