This fully up-to-date reference book provides an authoritative overview of the military helicopter. It begins with a detailed history, from the ideas of Leonardo da Vinci through to the tilt-rotor aircraft that have operated with coalition forces in Afghan-istan. The book continues with an A-Z directory covering over 80 helicopters from the most famous manufacturers including Aerospatiale, Agusta, Bell, Boeing-Vertol, Eurocopter, Kamov, Robinson, and Sikorsky. The origins, development and operation of each type are clearly described, and a specification panel gives key performance and dimensional data. This informative book is superbly illustrated with cutaway drawings and over 500 photographs showing helicopters both on the battlefield and in service.