The combination of vaccines was warned against by the British Health Ministry, but ignored by higher-ups. Hussein had been sold biological weapons by the same western powers testing out vaccines for them on their own soldiers. Their clothing and tents were treated with powerful insect repellants and pesticides, combinations of which are known to cause neurological damage. Some Hurricane Andrew victims who sheltered in these tents after the war became sick with similar symptoms. The roads and tent compounds the soldiers lived and worked in were saturated with oil, to keep down dust and repel pests.
Military vehicles have no emissions requirements or mileage standards.
Oil was the cheapest and most available substance available in that war fought to protect our continued slurping of it back home. Its fumes are immuno-suppressant. Numerous detections of chemical toxins during the war were ignored by officers charged with their soldiers lives. The records of these exposures and the callous indifference to the welfare of their troops have been made public. Sexual harassment in the military doesn't even compare with this negligence.