I'm about 500 turns into an epic game and have only just researched riflemen. The game is great, although it has its flaws. For the last 450 or so turns, I've had nothing but war with one of the AI. Is this something I'm doing? I just simply spend my time rushing from border to border to defend against an attack. I don't have a weak army and so far no one has managed to launch a succesful invasion. I'm just getting annoyed with constantly having to defend myself and was wondering if there was something I could do, or is this simply how the AI behaves?