In the immediate post-World War II period, Army aviation began to evolve from an observatory role to a mobility role. Helicopter air mobility began to develop in the Army from 1949 onwards. The outbreak of the Korean war assisted and accelerated the acceptance of greater helicopter air mobility within the Army. The Eisenhower period was a golden age for Army aviation, with rapid and extensive developments in air mobility doctrine and tactics. There was also a strong research and development effort to overcome the initial technological lag. These developments allowed the formation of the first air mobile division in 1965 to meet the growing demands of the Vietnam war. This work gives a new understanding of the process of military innovation. Moreover, this case study has important general implications for future military policy-making.

During the early stages of helicopter development, when helicopters were able to lift just slightly more than their own weight, the military services were eagerly seeking to obtain a variety of larger, more useful helicopters. The youthful helicopter industry expressed optimism, although at times unrealistic, in its ability to meet the military requirements. The development of the helicopter program within the Marine Corps was sparked by the foresight and imagination of the officers of the period. While early helicopters provided stepping stones for an orderly progression of the program, the slowness of the technical advances and the periods of financial austerity after World War II and Korea prevented the Marine Corps from developing the vertical envelopment concept as rapidly as desired. The program gained interest and momentum, however, as a result of the success of helicopters in Korea. As Lieutenant General Gerald C. Thomas stated: "Indeed, the helicopter gave clear evidence, from its first tactical employment, that a major advance in combat was at hand." This history, which traces the development of helicopters in the Marine Corps from 1946 to 1962, offers a tribute to the creative vision and planning of a handful of Marine officers who conceived of the vertical assault concept in amphibious operations at a time when suitable aircraft to make it work did not exist. The story of the subsequent struggle to procure and develop those aircraft, to refine a doctrine for their employment, and to familiarize the Marine Corps with their use is an interesting and vital part of modern Marine Corps history. The documentary basis for this monograph was primarily the official records of the Marine Corps and Navy Department, but considerable use was made of interviews and correspondence with key individuals involved in all phases of helicopter development.

The twentieth century witnessed the emergence of three-dimensionality in war: surface forces flow became prey for attackers operating above and below the earth and its oceans. The aerial weapon, prophesied for centuries, became a reality, as did air power projection forces. This insightful book by Warren A. Trest traces the doctrinal underpinnings of the modern United States Air Force, the world's only global air force. We the men and women who serve in the Air Force, but also our fellow airmen in America's other military services are the heirs and beneficiaries of a long heritage of doctrinal development and military thought. Our predecessors pursued a vision of airborne global reach and power that often put them at odds with those who could not break free of the confines of conventional thought and lock-step traditionalism. Fortunately, they had the courage of their convictions and the faith in their vision to continue to pursue the goal of global air power despite such resistance. Today, America is a genuine aerospace power, and that pioneering vision dating to the days of the Wright brothers, has expanded to encompass operations in space and between the mediums of air and space. As we approach the new millennium, it is well to ponder the lessons and the history of how a small group of truly gifted airmen transformed their nation's military establishment, and, in so doing, the world around them.