Self-Defence against Non-State Actors: Making Sense of the ‘Armed Attack’ Requirement

Author(s):  
Christian J. Tams
2018 ◽  
Vol 32 (01) ◽  
pp. 91-110 ◽  
Author(s):  
Erika de Wet

AbstractThe right to self-defence in Article 51 of the United Nations Charter is increasingly being invoked in response to armed attacks conducted by armed groups located in a territory of another state, with or without the (direct) assistance of such a state. This article examines the implications of the invocation of the right to self-defence under these circumstances for the principles of attribution within thejus ad bellumparadigm. First, it illuminates how the threshold requirements for indirect armed attacks (that is, the state acting through a private actor) have been lowered since the 1986Nicaraguadecision of the International Court of Justice. In so doing, the article suggests that in order to prevent a complete erosion of the benchmarks of an indirect armed attack, the notions of ‘substantial involvement’ in an armed attack, ‘harbouring’, and ‘unwillingness’ should be interpreted as manifestations of due diligence. Thereafter, the article illustrates that there is also an increasing attribution of armed attacks directly to non-state actors, notably those located in areas over which territorial states have lost control. Such states could be depicted as being ‘unable’ to counter the activities of non-state actors. The article further submits that particularly in these instances, the principle of necessity within the self-defence paradigm can play an important role in curbing the potential for abuse inherent in the vague notion of ‘inability’, if interpreted in light of Article 25 of the Articles on State Responsibility for Internationally Wrongful Acts.


Author(s):  
Gray Christine

This chapter discusses the general framework of the law of self-defence. The scope of the right of self-defence is the subject of the most fundamental disagreement between states and between writers. Some of the divisions over the scope of the right of self-defence, especially as to whether anticipatory self-defence against an imminent armed attack and the protection of nationals abroad are lawful, date back to the creation of the United Nations. Other divisions centre on the right to use force in self-defence in response to colonial occupation, to terrorist attacks, and to other attacks by non-state actors. This chapter also discusses the special regime of collective self-defence.


2010 ◽  
Vol 23 (1) ◽  
pp. 183-208 ◽  
Author(s):  
RAPHAËL VAN STEENBERGHE

AbstractThis article analyses the recent state practice in which the right of self-defence has been invoked in order to justify the use of force in response to attacks by non-state actors. The main purpose of this analysis is to determine whether the law of self-defence has evolved through this practice. It is submitted that the latter confirms the tendency, evidenced by the US operation ‘Enduring Freedom’ in Afghanistan in 2001, towards allowing states to respond in self-defence to private armed attacks, that is, attacks which are committed by non-state actors only. The article also aims to shed some light on other fundamental conditions of the law of self-defence which played a significant role in the legal assessment of the recent state practice. It is argued in this respect that this practice confirms that any armed attack must reach some level of gravity – which may be assessed by accumulating minor uses of force – in order to trigger the right of self-defence, and that proportionality of the action taken in self-defence may be assessed in quantitative terms, but only as a means of making a prima facie judgement about the necessity of this action.


2021 ◽  
pp. 149-164
Author(s):  
Ilias Bantekas ◽  
Efthymios Papastavridis

This chapter examines under what circumstances States may use armed force under customary international law and Arts 2(4) and 51 UN Charter. After noting that the use of armed force is generally prohibited and only limited to self-defence, and then only if the target State is under an armed attack, we show that several States have expanded the notion of armed attack. Besides self-defence, the United Nations Security Council may authorize the use of armed force through a process of collective security. Several examples of collective security are offered, as well as the ICJ’s position on what constitutes an armed attack. In recent years, the range of actors capable of undertaking an armed attack has included terrorists. Moreover, the development of the doctrine of the responsibility to protect is a significant achievement.


Author(s):  
Ilias Bantekas ◽  
Efthymios Papastavridis

This chapter examines under what circumstances States may use armed force under customary international law and Arts 2(4) and 51 UN Charter. After noting that the use of armed force is generally prohibited and only limited to self-defence, and then only if the target State is under an armed attack, we show that several States have expanded the notion of armed attack. Besides self-defence, the Security Council may authorize the use of armed force through a process of collective security. Several examples of collective security are offered, as well as the ICJ’s position on what constitutes an armed attack. In recent years, the range of actors capable of undertaking an armed attack has included terrorists. Moreover, the development of the doctrine of the responsibility to protect is a significant achievement.


Sign in / Sign up

Export Citation Format

Share Document