Some of the speculation of "Gulf War Syndrome" was built around the health effects of depleted Uranium used in some of our munitions, I recall pictures of our troops posing on top of Iraqi tanks shredded by our cannon fire. Other thoughts centered on vaccinations given to our troops, some of the antidotes against chemical weapons that were administered to US forces, and simple exposure to toxic smoke from the oil well fires set by Saddam, or low-level exposure to chemical agents used by the enemy. I really don't know enough about it to say if there is anything to any of this, but I know there was a lot of controversy.

I do know the government has strong incentives against admitting to any of this, just like they stalled on Agent Orange, but I really don't know of any corroborating evidence. For example, did our allies report symptoms of GWS? The enemy? Civilians?Troops in theater but not on the front line? I'm not familiar with any evidence other than anecdotal. And of course, you can prove anything you like with the Internet. There's a website for every conspiracy.