The most effective leaders are those who "lead from the front"

 Leadership is crucial to the success of the U.S. Army. The most effective leaders are those who "lead from the front" — this means they lead by example in thought, word and deed. Soldiers who choose Leadership Training are making it clear that they wish to take on more responsibility and thus rise in rank. The Army provides many opportunities for Soldiers to learn how to improve their leadership and teamwork skills.

http://www.goarmy.com/soldier-life/being-a-soldier/ongoing-training/leadership-training.html