Within the overarching issue of the interrelationship between IHRL and IHL are a number of operationally pressing sub-issues and challenges to IHL. This contribution briefly outlines seven of the most significant: 1) The absence of a methodology which allows for the practical application of the lex specialis doctrine ; 2) The interaction between ECtHR jurisprudence and the lex specialis doctrine when advising on the conduct of military operations during IAC ; 3) The extraterritorial scope of human rights treaties ; 4) Security Council Resolutions as a source of legal authority to engage IHL ; 5) Detention paragraph 100 in Al-Jedda ; 6) Right to life ; 7) Investigations of cases where force was lawful under IHL and the International Criminal Court