Warfare /(?)/

War·fare

Warfare

n.
  1. Military service; military life; contest carried on by enemies; hostilities; war.
    The Philistines gathered their armies together for warfare, to fight with Israel.
    — I Sam. xxviii. 1.
    This day from battle rest; Faithful hath been your warfare.
  2. Contest; struggle.
    The weapons of our warfare are not carnal.
    — 2 Cor. x. 4.

Warfare

v. i.
  1. To lead a military life; to carry on continual wars.