am grateful to have the opportunity to question the author about specific legal and operational challenges that have been insufficiently explored in the book. The Different Structures of Non-State Armed Groups International law has always conceived NSAGs as “unities”. IHL, for
instance, applies to a NSAG as a party to an armed conflict. The specific rules will vary in some respects depending on different elements. The 1977 Additional Protocol II (AP II) to the Geneva Conventions, for
instance, has a more restricted scope of application than the one of Common...