A wargaming renaissance has been underway in the US military. Having proven to be the most effective recruitment tool of the 21st century, games have proliferated across all levels of the military's strategic, operational, training, and rehabilitation architecture. From board games to high-tech digital and virtual reality platforms, wargames enable milarites to learn lessons from the past, play out possible responses to current crises, and explore the effectiveness of future operations and strategies. From the Russian invasion of Ukraine to the Covid 19 pandemic, today wargames are a key means by which the US military--and many other militaries--make plans and fight wars. Politics of Play is the first academic book dedicated to the US military wargaming renaissance. Grounded in 100 hours of interviews undertaken by the author during fieldwork with US military wargamers, it explores how games intervene in players' cognitive and affective registers using immersion and the drive to win. In addition, Politics of Play develops a new theory of play grounded in the thought of Jacques Derrida which seeks to expose and disrupt the politics and power relations at work in the use of games to produce warfighters in the digital age.