guerrilla 延伸
guerrilla warfare:
a form of irregular warfare in which small groups of combatants (such as paramilitary personnel, armed civilians, or irregulars) use military tactics (ambushes, sabotage, raids, petty warfare, hit-and-run tactics, and mobility) to fight a larger and less mobile traditional military
(Wikipedia https://en.wikipedia.org/wiki/Guerrilla_warfare)