Agent Orange VA Claims: Thailand Air Bases & Korea DMZ Guide (2026)

Deep-Dive Guides: Thailand and Korea DMZ

This hub page provides a unified overview. For the full deep-dive on each location, use the dedicated guides below:

Thailand Air Base Agent Orange Exposure: Overview

Between approximately 1962 and 1975, the U.S. Air Force operated multiple major air bases in Thailand used for Vietnam War combat missions. To maintain clear lines of sight along base perimeters and prevent infiltration, the Air Force used herbicides — including Agent Orange (containing dioxin TCDD), Agent Blue (cacodylic acid), and commercial herbicides like bromacil — to kill vegetation along fence lines and perimeter barriers.

This is not disputed: both the Department of Defense and VA have acknowledged herbicide use at Thai bases. The issue for veterans is that Thailand service does not create an automatic Agent Orange presumption the way Vietnam service does under 38 CFR § 3.307(a)(6). Instead, Thailand veterans must establish exposure on a case-by-case basis.

Why Thailand Is Treated Differently Than Vietnam

The blanket Vietnam presumption exists because Agent Orange was sprayed across massive swaths of the country during Operation Ranch Hand — millions of gallons over millions of acres. Virtually any veteran who set foot in Vietnam during the covered period had significant exposure potential. Thailand was different: herbicide use was concentrated at specific locations (base perimeters) and was not widespread across the country. Therefore VA requires Thailand veterans to demonstrate their specific duties brought them into contact with treated areas.

Qualifying Thailand Air Bases

VA recognizes herbicide use at the following U.S. air bases in Thailand during the Vietnam War era:

If you served at a Thai base not on this list, you may still be able to establish exposure through unit records and herbicide application documentation, but the evidence burden will be higher.

Evidence Requirements for Thailand Air Base Veterans

VA evaluates Thailand exposure claims by asking whether the veteran's regular duties brought them to or near the base perimeter where herbicides were applied. The standard is not whether herbicides were used at the base generally — it is whether you personally were exposed.

Strong Evidence Positions

• Security Police (AFSC 811X0) — Perimeter patrol was a core duty. VA broadly recognizes security police at qualifying Thai bases as having exposure.
• Military Working Dog (MWD) Handlers — Dog teams conducted regular perimeter sweeps, directly in treated vegetation areas.
• Explosive Ordnance Disposal (EOD) — Perimeter security tasks included EOD clearances of the perimeter fence line.
• Combat Arms/Infantry attached to base security — Army and Marine units providing base security had perimeter duties.
• Communications and radar specialists at perimeter towers — Tower maintenance and manning required access to perimeter areas.

Evidence You Can Submit

• DD-214 showing assignment to a qualifying Thai base
• AF Form 7 (Airman Military Record) showing AFSC and duty station
• Unit orders, morning reports, or TDY orders showing time at the base
• Personnel file documents showing security or perimeter duties
• Personal statement describing your duties and proximity to the perimeter
• Buddy statements from fellow veterans who can corroborate your duties
• VA Form 21-0781a (Statement in Support of Claim for Service Connection for PTSD — Secondary to Personal Assault) if relevant

Korea DMZ Agent Orange: Who Qualifies

Agent Orange and other herbicides were used in the Korean DMZ between 1968 and 1971 by U.S. Army units responsible for maintaining clear firing lanes and observation corridors along the southern edge of the Demilitarized Zone. This herbicide use was declassified and acknowledged by DOD in the 1990s following congressional pressure.

VA's current standard for Korea DMZ benefits: a veteran qualifies for Agent Orange presumptive exposure if they served between April 1, 1968, and August 31, 1971 in a unit that, per Department of Defense records, operated in or near the Korean DMZ. This is defined as the area between the southern boundary of the DMZ and a line 10 kilometers south of the southern boundary — essentially the area immediately south of the DMZ down to the Han River estuary in the west.

Korea DMZ Qualifying Units and Service Periods

DOD has identified specific Army units that served in the DMZ zone during the qualifying period. These include:

If your unit is not on VA's list, you can still establish exposure by submitting unit records (morning reports, unit diaries, historical records) showing your unit operated within the qualifying geographic area during the qualifying period. National Archives holds Korean War-era Army unit records that may help.

Service Period: 1968–1971

The April 1, 1968 – August 31, 1971 window is specific and enforced. Veterans who served in the Korean DMZ area outside this window — including during the Korean War itself (1950–1953) or after 1971 — do not automatically qualify for the Agent Orange presumption, though they may be able to establish actual herbicide exposure through other evidence (M-CRESS records, unit history, command-level documents authorizing herbicide use).

Evidence Requirements for Korea DMZ Veterans

• DD-214 showing service in Korea during April 1, 1968 – August 31, 1971
• Service records showing unit assignment — specific unit must match DOD's list OR be shown to operate in the qualifying zone
• Unit morning reports or diaries (National Archives) confirming location
• Personal statement describing your patrol areas, guard post assignments, and proximity to the DMZ fence
• Buddy statements from fellow veterans who served alongside you in the DMZ area

Presumptive Conditions: What You Can Claim

Once you establish qualifying exposure — either through the Korea DMZ presumption or through facts-found Thailand exposure — you are entitled to the same list of Agent Orange presumptive conditions as Vietnam veterans. Under 38 CFR § 3.309(e), the current list includes:

Thailand vs. Korea DMZ: Key Differences Side by Side

How to File Your Claim

Whether you're a Thailand air base veteran or a Korea DMZ veteran, the basic claim process is the same:

1. Establish your service — gather DD-214, unit records, and any documents showing your assignment and duties
2. Get a current diagnosis — for any Agent Orange presumptive condition you are claiming
3. Document your exposure pathway — personal statement + buddy statements + service records
4. File VA Form 21-526EZ — online at VA.gov or through an accredited VSO or attorney
5. Submit all evidence at once — do not send partial submissions; submit everything together
6. Request a rating review if denied — many Thailand and Korea DMZ claims are initially denied due to incomplete exposure documentation; appeal with additional evidence