" only a small minority of military personnel have combat-related jobs. In 2015, even after two lengthy wars, the percentage of military personnel in combat specialties was only 14 percent overall—with substantial differences between the services: for instance, 28 percent of enlisted Army personnel serve in jobs that are classified as combat positions compared to just 3 percent of Navy enlisted personnel.
To be sure, many military personnel in noncombat positions end up in combat [zones] anyway. . . . But even when deployed in combat zones, most members of the military never end up fighting. "

― , How Everything Became War and the Military Became Everything: Tales from the Pentagon