Book excerpt: On the 29th of June 2014 ISIS declared the establishment of a caliphate stretching across territories in Iraq and Syria. In response, Operation Inherent Resolve, a US-led 77 nation coalition, was launched to respond to the threat of Islamic State. The West's War Against Islamic State offers the first history of Operation Inherent Resolve and the West's war against ISIS, from its inception in 2014 to the fall of Raqqa in 2017. Andrew Mumford offers a comprehensive analysis and assessment of the military campaign deployed against ISIS in Syria and Iraq by examining the West's strategic objectives as well as the conflicting interests of rival powers, namely Russia, Iran and Turkey. By examining individual operational components of this military engagement such as drone usage, cyber warfare, special forces operations and sponsorship of guerrilla forces, this book offers a unique insight into the nature of modern warfare.