Webster's Revised Unabridged Dictionary · 1913

Warfare

Warfare , noun

[War + Old English fare a journey, a passage, course, Anglo-Saxon faru. See Fare, 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. — Milton
2.
Contest; struggle.
The weapons of our warfare are not carnal. — 2 Cor. x. 4

Warfare , intransitive verb

To lead a military life; to carry on continual wars. — Camden