Introduction

This chapter outlines the important role that this volume contributes to the broader terrorism studies literature. Terrorist groups have evolved since 9/11, with the Islamic State often described as a pseudo-state, a terrorist group, and insurgency at the same time. As such, this chapter explains why it is necessary to take a broader view of counterterrorism, which can, and often does, include irregular warfare. The chapter also introduces the volume’s subsequent chapters, which are grouped into three sections: the threat and regional security issues, operational case studies, and government instruments in combating terrorism and waging irregular warfare.