Self-defence against terrorist attacks

The article analyses the concept of self-defence against non-state actors – terrorist groups. The events of last decades where non-state actors (terrorist groups) had carried out attacks amounting to armed attack in sense of Article 51 of UN Charter left a dilemma for states whether the right to self-defence encompasses as well actions against non-state entities. The state practice illustrated in present article supports the idea that self-defence is possible against whoever committed armed attack, be it a state or non-state entity. The article also discusses the standard of action against states harbouring terrorists.