Most importantly, Defeating ISIS gives a step-by-step analysis of the street-level tactics the group has employed in assaults against fortified targets, in urban combat, and during terrorist operations such as those in Paris during the November 13 attacks. As much as ISIS is a threat to Western targets and regional stability in the Middle East, Nance describes not only its true danger as a heretical death cult that seeks to wrest control of Islam through young ideologues and redefine Islam as a fight to the death against all comers, but also how to defeat it. Defeating ISIS is the first highly detailed look into the organization by one of the world's foremost authorities in counterterrorism.