...because of effective control, or if the State of sojourn offers the terrorist actor protection and is unwilling or unable to take effective action against it (cf. once again BVerfG, 2 BvE 2/16, paras. 50–51). In this case, an international armed conflict may even arise between the attacking State and the State of sojourn (ICRC Commentary, para. 511). A prerequisite for invoking
self-defence, however, is that the use of force against which the attacking State is defending it
self exceeds the threshold of an “armed attack” within the meaning of Article...