Threats During Desert Storm - gulf war
Chemical Agent Threat During Desert Storm
A GAO report found that not all units were in full compliance for protective clothing, possibly because of false alarms. It is possible that if chemical agents were released, the less-than-full-compliance may have allowed soldiers to be exposed to agent.
It appears as if the scientific question of whether Gulf War syndrome was caused by exposure to lethal chemical warfare agents or to some other causative agent such as infectious diseases or exposure to depleted uranium, is still open. Nevertheless, it can be said that had the chemical countermeasures been more effective, there would probably be less controversy surrounding the issue of chemical agent exposure.
(It is from the 10% which suffered unexpected post deployment sympthoms seeking care federal practioners Tricare & VA years later)