"fighter in an irregular, independent armed force," 1809, from Spanish guerrilla "body of skirmishers, skirmishing warfare," literally "little war," diminutive of guerra [..]

having to do with warfare conducted by organized groups of civilians, not soldiers or the military.

a member of an irregular armed force that fights a stronger force by sabotage and harassment Guerrilla warfare is a form of irregular warfare and refers to conflicts in which a small group of combatan [..]

The “small war” – Spanish patriots fighting outside field armies (guerrilleros)

rebel or insurgent; people who are fighting with non-traditional tactics against a standing army. Guerrillero

Literally “little warrior,” a person functioning within an unofficial, irregular fighting force and carrying out small-scale hostilities -- such as sniping, acts of terrorism, and sabotage -- against [..]

(n) a member of an irregular armed force that fights a stronger force by sabotage and harassment

==Warfare== * '''1962''', Robert Rawson Monroe, ''Limited War Strategy of the United States'', page 164: *: Operations would be as much political and non-military as they would be military, and probab [..]

A member of a small independent group taking part in irregular warfare.