Introduction: Burn pits have known individual carcinogenic byproducts, including polyaromatic hydrocarbons and volatile organic compounds, which have a presumptive link between deployment exposure and tumorigenesis. However, there are a dearth of epidemiologic data describing the long-term cancer incidence in U.S. service members who were exposed to burn pits during deployment to Iraq. A retrospective cohort study was carried out with the goal of assessing long-term cancer risk in service members who deployed to Iraq and reported exposure to burn pits.