"Guerrilla" and "Guerrilla War" redirect here; not to be confused with Gorilla. For other uses, see Guerrilla (disambiguation).Guerrilla warfare is a form of irregular warfare in which a small group of combatants such as armed civilians or irregulars use military tactics including ambushes, sabotage, raids, petty warfare, hit-and-run tactics, and mobility to fight a larger and less-mobile traditional military.