U.S. Department of Defense[r]: one of more than a dozen U.S. executive-managed government agencies; this one administers the military forces of the United States, and their supporting civil servants. [e]
Warfighter[r]: An informal term encompassing those parts of armed services that engage in combat or have a high likelihood of combat risk: combat arms and combat support in land forces, warships, combat aircraft and aircraft that support them [e]