war-risk hazard
(13) “war-risk hazard” means a hazard arising during a war in which the United States is engaged; during an armed conflict in which the United States is engaged, whether or not war has been declared; or during a war or armed conflict between military forces of any origin, occurring in the country in which an individual to whom this subchapter applies is serving; from— (A) the discharge of a missile, including liquids and gas, or the use of a weapon, explosive, or other noxious thing by a hostile force or individual or in combating an attack or an imagined attack by a hostile force or individual; (B) action of a hostile force or individual, including rebellion or insurrection against the United States or any of its allies; (C) the discharge or explosion of munitions intended for use in connection with a war or armed conflict with a hostile force or individual; (D) the collision of vessels on convoy or the operation of vessels or aircraft without running lights or without other customary peacetime aids to navigation; or (E) the operation of vessels or aircraft in a zone of hostilities or engaged in war activities;