Guerrilla_warfare Guerrilla warfare is the unconventional warfare and combat in which a small group of combatants use mobile tactics (ambushes, raids, etc.) to combat a larger and less mobile formal army. The guerrilla army uses ambush (stealth and surprise) and mobility (draw enemy forces to terrain unsuited to them) in attacking vulnerable targets in enemy territory.This term means "little war" in Spanish and was created during the Peninsular War.