This book adopts an innovative new approach to examine the role of maritime power and the utility of navies. It uses a number of case studies based upon key Royal Navy operations in the twentieth century to draw out enduring principles about maritime power and to examine the strengths and limitations of maritime forces as instruments of national policy. Individual chapters focus on campaigns and operations from both World Wars and a series of post-1945 crises and conflicts from the Palestine Patrol in the 1940s to Royal Navy operations in support of British policy in the 1990s.