This book makes a compelling case that lethal drone deployment as a counterterrorism tool and instrument of statecraft in targeted states engenders far-reaching consequences for US grand strategy. By examining how successive US administrations since 9/11 have deployed drones in pursuant of different typologies of US grand strategic objectives, the book probes the putative political and strategic goals drones supposedly advance, and the impact of its continued proliferation for US for international security. The book provides a powerful base of evidence for policy makers and researchers by pointing to the perils of deployment of drone technology beyond their immediate or short-term objectives. It also explores how non-state actors and authoritarian regimes such as armed groups are harnessing armed drone technologies for their own political and military ends, as well as the underlying implications for US grand strategy and international security at large.