In a study published by the JAMA Network, researchers at Brown University and the University of Pennsylvania found that young, military-aged males from "zip codes with the most violence in Chicago and Philadelphia had a notably higher risk of firearm-related death than US military personnel who served during the wars in Afghanistan and Iraq." https://thepostmillennial.com/young-adult-males-in-major-us-cities-at-higher-risk-of-death-from-gun-violence-than-wartime-counterparts