[Crono]

Hitler was also stupid when it came to certain subjects. He rarely listened to his miltary advisors (read: Dunkirk and Stalingrad), which costed him big time as the war went on. Although, he did turn a poor Germany into a powerful war machine, which, like people said, was pretty amazing. I don't know much of the Mongol Empire, all I know is that they conquered Russia and much of Asia.

Two weeks or so ago, I watched a great show about Hannibal on the history channel, and he seemed pretty damn amazing to face up to the Roman Empire like that. He won battles even when the Romans had double the amount of troops.

I don't know who to pick though, there have been so many great conquerors...