Book excerpt: Armed robotic systems-drones and droids-now emerging on the battlefield portend new strategic realities not only for U.S. forces but also for our allies and future potential belligerents. Numerous questions of immediate warfighting importance come to mind with the fielding of these drones and droids that are viewed as still being in their experimental and entrepreneurial stage of development. By drawing upon historical weapons systems life cycles case studies, focusing on the early 9th through the mid-16th-century knight, the mid-19th through the later 20th-century battleship, and the early 20th through the early 21st-century tank, the monograph provides military historical context related to their emergence, and better allows both for questions related to warfighting to be addressed, and policy recommendations related to them to be initially provided.