* Guerrilla warfare: A form of irregular warfare in which small groups of combatants, typically civilians, use military tactics such as ambushes, sabotage, and raids to fight a larger and better-equipped enemy.
* Guerrillas: The individuals who engage in guerrilla warfare.
The word "guerrilla" originates from the Spanish word "guerra," meaning "war." The suffix "-illa" often denotes something small or diminutive.