1. About how fast can a horse travel in the desert? How about a camel? How far could you go in a day, and how often would the animal need to stop for water?
2. In said desert, about how far away could you see?
3. Anyone know of any good resources on warfare? (Tactics, weapons, etc.)
4. Resources on pre-Islamic cultures/religions in the area? (Not that anyone would be currently practicing them, more for ancient ruins, superstitions, and the like. ;)