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    Chemical Warfare Agents (Khamisiyah, CHASE, Edgewood)

    Last updated: May 2026
    Destroyed Iraqi munitions bunker at Khamisiyah after demolition, with scattered artillery shells and dust on the desert ground.
    General education only. This page describes how VA generally evaluates these claims under federal regulations. It is not legal advice and is not a recommendation about any individual claim. Every veteran's facts and evidence are different — for guidance on a specific situation, speak with a VA-accredited representative.

    What Khamisiyah & chemical warfare agents is

    • Khamisiyah: low-level sarin and cyclosarin plume from March 10, 1991 bunker demolition; DoD modeling identified affected units.
    • Edgewood Arsenal: Army research program testing nerve agents, hallucinogens (BZ, LSD), and other CW/BW agents on enlisted volunteers.
    • Project 112 / SHAD: ship-based chemical and biological warfare tests conducted on Navy crews.

    Who was exposed

    • Khamisiyah: units identified in DoD's exposure modeling (mostly XVIII Airborne and supporting units operating in southern Iraq, March 1991).
    • Edgewood: roughly 7,000 volunteers across the program window.
    • Project 112 / SHAD: identified Navy and Marine units, list maintained by DoD.

    Recognized conditions & VA framework

    • Khamisiyah veterans: claims travel under 38 CFR § 3.317 () for chronic multisymptom illness — no separate Khamisiyah presumption.
    • Edgewood / Project 112 / SHAD: VA recognizes exposure for participating veterans; claims are with a opinion. VA maintains exposure-specific outreach.
    • Long-term sarin literature supports claims for Parkinson's disease, cognitive dysfunction, and chronic GI symptoms — direct claims with .

    Evidence to gather

    • Khamisiyah: DoD or DA Form 4187 placing the in an affected unit.
    • Edgewood / SHAD: DoD recognition letter or unit roster confirming participation.
    • Treating-provider documentation of chronic neurological, cognitive, or other symptoms.
    • opinion for direct claims outside the § 3.317 presumption.

    Claim path

    1. Khamisiyah veterans with chronic multisymptom illness: file under § 3.317 — cleanest path.
    2. Edgewood / SHAD: citing the specific exposure event.
    3. Khamisiyah veterans with specific diagnosed conditions outside § 3.317: direct with .

    Authoritative reference

    VA Public Health publishes its own overview of this exposure. Use it as a citation in your narrative: https://www.publichealth./exposures/categories/warfare-agents.asp

    Where these claims break down

    • ×Filing 'sarin exposure' as a freestanding claim — sarin is the exposure pathway; the claim is for the resulting condition.
    • ×Not requesting the DoD Khamisiyah notification letter — it is the strongest piece of unit-level evidence.

    Frequently Asked Questions

    Useful Tools & Topics

    Have questions about your specific case?

    Every veteran's facts are different. A free initial consultation with a VA-Accredited Claims Agent can tell you whether your matter is a fit for representation — and what the right next step looks like either way.

    Disclaimer: This page is for educational purposes only and does not constitute legal advice. Oakridge Claims is a private business and is not affiliated with, endorsed by, or operated by the U.S. Department of Veterans Affairs. No guarantees of outcomes are made. Each claim is decided on its individual facts.

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