The Military Metaverse explores the impact that the Metaverse is having today on how the world’s militaries procure, maintain, train, plan, and fight, and how the Metaverse presents new challenges and opportunities for future conflict. The military were early adopters of Virtual Reality and Augmented Reality technologies and wider simulation systems. Before 2010 they were one of the few sectors that could afford the technology, and millions of military R&D dollars went into developing and understanding these technologies. However, as the democratisation of Metaverse technologies has happened over the past decade, there is a danger that militaries have been overtaken and caught short, encumbered with often costly legacy systems, sold and maintained by prime contractors, while the gaming and consumer market has cheaper and more innovative and agile systems. This book provides a history of the use of Metaverse technologies in the military, particularly in the areas of design,