Once armed conflict is initiated, and irrespective of the reason or legitimacy of such conflict, the jus in bello legal framework is triggered. Therefore, where an occupation already is in place, the right to initiate militarized force in response to an armed attack, as opposed to police force to restore order, is not a remedy available to the occupying state. The beginning of a military occupation marks the triumph of one belligerent over another. In the case of Israel, its occupation of the West Bank, the Gaza Strip, the Golan Heights, and the Sinai in 1967 marked a military victory against Arab belligerents.
Occupation Law prohibits an occupying power from initiating armed force against its occupied territory. By mere virtue of the existence of military occupation, an armed attack, including one consistent with the UN Charter, has already occurred and been concluded. Therefore the right of self-defense in international law is, by definition since 1967, not available to Israel with respect to its dealings with real or perceived threats emanating from the West Bank and Gaza Strip population. To achieve its security goals, Israel can resort to no more than the police powers, or the exceptional use of militarized force, vested in it by IHL. This is not to say that Israel cannot defend itself—but those defensive measures can neither take the form of warfare nor be justified as self-defense in international law. As explained by Ian Scobbie: