This book analyzed the development of Turkish defense industry and the functions of Undersecretariat for Defense Industry. First, the evolution of defense industries in the world and today''s propects of these industries were evaluated. Second, the historical background and today''s situation of Turkish defense industry and Turkish procurement process were examined. Third, the role of Undersecretariat for Defense Industries, its legal basis and its composition were analyzed. This book will provide a substantial background knowledge for people who are interested in Turkey''s defense industry policies.