Wartime Era
Five generations, five different chemistry sets, and one shared layer of law that most veterans are never told about. Start with the theater, then build the personal pathway: unit, every location, actual duties, and combined exposures.
Every wartime era handed its veterans a different chemistry set. Korea handed men tactical herbicides along a fence line and unvented kerosene heaters inside frozen huts. Vietnam handed them dioxin, shipboard asbestos, and aviation fuel. The 1991 Gulf War handed them more than 600 burning oil wells, unrecorded pesticide application, and nerve-agent pretreatment tablets. Post-9/11 deployments handed them ten-acre burn pits, hexavalent chromium, and fine desert particulate. The Cold War handed them nuclear test participation, chemical-agent volunteer programs, and contaminated installations inside the United States. Those are not interchangeable claims, and VA does not decide them under the same regulations.
But the eras share far more than most veterans are told. The PACT Act presumptions are the clearest shared layer: the same 23 burn-pit conditions cover a Desert Storm veteran and an Afghanistan veteran, and the same herbicide list covers a Vietnam veteran and a Korean DMZ veteran inside his window. Asbestos, industrial solvents, leaded fuel, PFAS firefighting foam, and contaminated base water ran through all five eras. So the working method is identical everywhere: find the presumption your service actually fits, and if there is not one, build the exposure on the facts — unit, every location, and every duty you actually performed. Each file below spells out what is unique to that generation, what it shares with the others, what those exposures can cause, what the rating criteria actually say, who qualifies, and which VA registry exam applies.
Korean War & DMZ Exposures
Korea claims can involve tactical herbicides near the DMZ, radiation, fuels, pesticides, asbestos, and industrial chemicals. Qualifying DMZ service has a defined presumptive window; service outside it may still support direct, facts-found exposure.
Korea’s veterans are fighting a records problem first and a medical argument second. Most Army personnel files from this period burned in the 1973 St. Louis fire, and the herbicide presumption VA offers here is the narrowest in the law — one fence line and a four-year window. Everything outside that window has to be proven from unit histories, duty descriptions, and a clinician willing to put the exposure in writing.
Unique to this era
Shared with other eras
Vietnam War Exposures
Vietnam-era analysis includes Agent Orange and other tactical herbicides, the TCDD dioxin contaminant, shipboard asbestos, fuels, solvents, lead, coatings, and combustion products.
Vietnam veterans have the widest presumption in the law and still get denied — usually over where the ship anchored, which base in Thailand, or a diagnosis that is one word away from the list. The other half of this era is under-rating: prostate cancer paid at 100 percent, reduced six months after treatment, then rated near zero on residuals no examiner ever measured.
Unique to this era
Shared with other eras
Gulf War Exposures
The Gulf War was a multi-exposure environment: more than 600 burning oil wells, pesticides, pyridostigmine bromide pills, Khamisiyah nerve-agent concerns, depleted uranium, sand, fuels, exhaust, vaccines, and environmental stressors.
Desert Storm veterans spent a decade being told nothing had happened to them. The undiagnosed-illness regulation written for this generation, 38 CFR § 3.317, is still one of the most powerful and least used tools in the law — and the PACT Act quietly added these veterans to the burn-pit presumptions most people associate only with Iraq and Afghanistan.
Unique to this era
Shared with other eras
GWOT / Post-9/11 Exposures
Burn pits disposed of plastics, chemicals, paint, medical and human waste, and petroleum products—sometimes using JP-8. Veterans also encountered sand, dust, diesel exhaust, industrial pollution, sulfur-fire smoke, and task-specific hazards.
This is the generation the PACT Act was written for, and it is still the generation whose breathing claims get denied because the pulmonary function test was taken on a good day. The schedule says a daily inhaler alone meets the 30 percent criterion, and a verified history of attacks carries an asthma claim when the examination is quiet. Almost no one is told either sentence.
Unique to this era
Shared with other eras
Cold War Exposures
Cold War claims can involve atmospheric nuclear testing, Enewetak cleanup, Palomares or Thule response, Project 112/SHAD, chemical-agent training, calibration sources, fuels, solvents, and contaminated installations.
Cold War service produced very few combat records and an enormous amount of exposure. Nuclear test participation, chemical-agent volunteer programs, contaminated installations inside the United States, radar and fuel work — all of it sits under regulations that demand a dose estimate or a documented fact pattern instead of a list. These claims are won on paper, not on the diagnosis.
Unique to this era
Shared with other eras
Reserve and Guard service counts when the law says it counts. Exposure can occur during active duty, active duty for training, or inactive duty training; compensation still depends on the governing service and service-connection requirements.