Unlike an airplane, a helicopter can move in all directions and hover in place with the help of its rotors. These abilities make helicopters useful tools for multiple branches of the military. In this introduction to military helicopters, young readers find an overview of the history of helicopters and a survey of the most popular types used to transport troops and cargo. With full-color photographs and a diagram of a helicopter, this book gives readers a new understanding of the mighty role this machine plays in the military.