The United States of America did not become the world's foremost military air power by accident. Arriving at this position has been a long and difficult learning process that continues to present day. The learning curve--World War I, World War II, the Korean War, the Vietnam War, the Gulf War, and more recently, the War on Terror--has been a steep one. While climbing this curve, the U.S. has not only produced superior military aircraft in greater numbers than its foes but has--in due course--out-trained them, too. This work is designed to provide the reader with a comprehensive historical survey, including technical specifications, drawings, and photographs, of each type of fixed and rotary-wing aircraft used by U.S. military forces over a 98-year period to accomplish the first step of the learning process: the training of pilots and aircrews.