The privatization of defence assets and the outsourcing of military services from the armed forces to the private sector is an increasing trend. This book approaches the issue of military privatization by linking it to the transformation of the defence industries since the early 1990s, and shows the extent to which many military functions and activities, ranging from military research to military consulting/training to operational support services, have already been outsourced in the US and in Europe. This detailed study provides new and updated information on the ongoing privatization of the defence sector and offers an original theoretical explanation as to why the most modern armed forces throughout the world have come increasingly to rely on private companies for nearly everything they do. Contributing to a better understanding of military privatization and its close connection to technological change, the book explains the complexity of the whole phenomenon and discusses its implications for national and international security.