KC-390: Power, Cooperation and Deterrence in South America reveals how a Brazilian aircraft has become a key player in power projection, regional cooperation and strategic deterrence on the South American continent. The result of the operational experience and academic rigor of Lieutenant Colonel Bruno Américo Pereira, this book delves into the multifaceted role of the KC-390 Millennium - from logistical transport to in-flight refueling, from support for humanitarian missions to a deterrent presence on sensitive borders. Based on the concepts of Hard Power, Soft Power and Smart Power, the authors propose a clear, current and strategic reading of Brazilian defense policy, connecting theory and practice at one of the most challenging moments in regional security. More than a book on military technology, this book is an invitation to reflect on the future of national defense and Brazil's role as a cooperative power in South America.