Middle voice from the base of G4756; to serve in a military campaign; figuratively to executetheapostolate (with its arduous duties and functions), to contend with carnal inclinations
KJV Usage: soldier, (go to) war (-fare).
From G473 and G4754; (figuratively) to attack, that is, (by implication) destroy
KJV Usage: war against.
From G4754; an armament, that is, (by implication) a body of troops (more or less extensive or systematic)