I spent alot of time out in the woods at Fort Hood from 90 to 93. All over the whole post. One thing that I would suspect is Snake bite. I've run into alot of rattlers out there and others that I had no idea what they were.

Spider bites and those big orange centipedes are a possibility too.

Nighthiker is right about the suppliments too. Way too many people trying to "bulk up" in the army.

Even in the hottest of summers there is plenty of water to be found anywhere on Fort Hood if you look for it.

The typical land nav course in the army starts with classroom refresher on map and compass reading and then goes out to the bush. The course for WLC would be a commonly used course that isn't out of the way and they would be given a "panic azimuth" to have on them in case of emergency that would take them to a road that they could follow back to civilization. Overall, land nav training in the army is terrible. They dont teach what people really need to learn, terrain association. How to read the land is very important. That is hard to teach. The proliferation of GPS's hasn't helped things much either. I know people that cant even follow a GPS to get where they need to go. Would go right off a cliff or through a building if they could.