The previous three Modules ( Modules 3-5) examined the principal legal instruments governing regional and international criminal justice/human rights approaches to countering terrorism. As it was observed, criminal justice approaches, underpinned by the rule of law, should be the normal response to terrorist threats and crimes. Building on the core objectives and sources of international humanitarian law (IHL) explained in Module 3, this Module focuses on issues of particular relevance to counter-terrorism efforts within an armed conflict setting. In particular, it focuses on recent and currently contentious issues that have arisen in respect of non-State actors such as Al Qaida and Islamic State of Iraq and the Levant (ISIL), namely in response to the classification of different types of conflict and applicable bodies of rules; and, the existence and implications of the categorization of persons as combatants, protected persons or criminals (some use the term 'unlawful combatants').