This book is a revised publication in the series on Aerospace Education II. It describes the employment of aerospace forces, their methods of operation, and some of the weapons and equipment used in combat and combat support activities. The first chapter describes some of the national objectives and policies served by the Air Force in peace and war. The second and third chapters examine the mission and structure of major Air Force operating commands. The fourth chapter describes the various support commands and operating agencies maintained by the Air Force to back up its combat forces. The last chapter reviews the aerospace role of the Army, Navy, and Marine Corps. (PS)