Book excerpt: What does it take to lead an army in battle? What does it take to win? Competent leaders of character are essential for the Army to meet the challenges in the dangerous and complex security environment we face today. The U.S. Army Leadership Handbook (FM 6-22) is the Army’s flagship field manual on leadership. It establishes leadership doctrine and fundamental principles for all officers, noncommissioned officers, and Army civilians across all components using the “BE-KNOW-DO” concept. It is critical that Army leaders be agile, multiskilled athletes who have strong moral character, broad knowledge, and keen intellect. Leaders—military and civilian alike—must set the example, teach, and mentor, and this manual provides the principles, concepts, and training to accomplish this important task. Filled with leadership principles crucial to the U.S. military and equally applicable to leaders in any walk of life, this up-to-date manual from the Army will teach all leaders everything they need to know.