Combating sabotage of submarine cables and pipelines is a matter of law enforcement, subject to the international law of the sea. However, such acts may also constitute the use of force and an armed attack under Articles 2(4) and 51 of the UN Charter. The application of these concepts requires clarification of the “international relations” in which the use of force takes place and identification of the State against which the armed attack occurs. This article argues that, in the absence o...