An insurgency is a rebellion against authority (for example, an authority recognized as such by the United Nations) when those taking part in the rebellion are not recognized as belligerents (lawful combatants).[1] An insurgency can be fought via counter-insurgency warfare, and may also be opposed by measures to protect the population, and by political and economic actions of various kinds aimed at undermining the insurgents' claims against the incumbent regime.[2] As a concept, insurgency's nature is ambiguous.