Warfare n. : Military service; military life; contest carried on by enemies; hostilities; war.

Warfare n. : Contest; struggle.

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

Example:
How do the psychological aspects of Warfare of today compare to those of Warfare during the Civil War?

Taxonomy
warfare, factors, combat, opponent, society, free encyclopedia, conflict, armed forces, Military operations, Wars, Terrain, low intensity warfare, High intensity, Dunnigan, guerilla warfare, weapon, modern warfare, search.

Defination from the web:
Warfare refers to the conduct of conflict between opponents, and usually involves escalation of aggression from the proverbial "war of words" ... Warfare between groups, and military organisations requires a degree of planning and application of military strategy to be conducted effectively ...