Sorry if you guys consider this slightly off-topic but I just wanted to address a couple people's points. Being I am actually trained in history as a discipline and I know a few things about a couple people's comments I thought you might all appreciate a little elucidation.
@Dunecat - Mongol bows were superior in the sense of portability and armor penetration to a longbow, this is very true. There were some trade-offs involved here, however. Mongol bows had far inferior range, which makes sense, seeing as they were used in an entirely different manner. Mongol archers were mounted skirmishers, not long range bombardment. Mongol archers rode in on their targets, sometimes to just out of melee range, and shot point blank. The point of the mongol bow was ease of use from horseback, not marksmanship at range. A longbow was designed for long range shots, the standard battle engagement range being something in the area of 250 yards, well above what a mongol bow could be expected to handle with any kind of accuracy. Longbows also, while mostly used for general bombardment in formation(in other words, you didn't really aim with a longbow, you lobbed in the direction) were capable of solid accuracy, which leads into the other comment I wanted to address...
@Kafein - What you say is, historically, utter nonsense. Longbows, and bows in general, actually, were capable of far longer range than any crossbow. Crossbows were not developed because they were better, but because they were easier. A bolt was capable of greater armor penetration on average, this was true, but they couldn't do anything approaching the range or accuracy. Crossbows were imprecise weapons, used primarily by non-archers. They were easy to load, required no great skill to use, and were an alternative for those without the skill and training of the more traditional archer. This shifts and gets blurry as you get closer to firearms, but it is generally true. I also would like to point out, the aiming in the game is rather clunky and imprecise. Probably heavily due to lag and hit box detection errors, but still. I don't know if you've spent much time playing as an archer, but it's not some cheap easy thing. I have fired historically accurate replicas of longbows, seen experts use them, etc. and I can tell you they are quite accurate, despite your claim to the contrary.