This comparative history of the military helicopter doctrines of the major powers since World War II focuses on the last twenty years. This unusual analysis of the decision-making process associated with the use of helicopters in conventional air-land warfare should provoke interest and controversy among students and experts concerned with military strategy. This substantial research study is intended for academics, professionals, policy makers, and all interested in the development of helicopters over the last fifty years. Matthew Allen examines military helicopter doctrines in the United States, former Soviet Union, the United Kingdom, Germany, and France. He describes changes and innovations in the use of helicopters in air-land battle. He also assesses how decisions are made and innovations develop. An appendix summarizes the technical characteristics of helicopters and photographs bring them to life. A bibliography points out the most significant sources for further research; figures clarify the complex decision-making process, and tables provide additional data. A full index makes this rare history accessible.