Here's a very good, concise view of leadership and selflessness, and how selfless leaders put the needs of their subordinates first, for the good of the organization. Not surprisingly, it's written by an Army officer.
One of the most enduring lessons I learned as a junior officer was also a simple one--when in command of a group, you go to the end of the chow line, and let everyone else eat first. Would that more managers, CEOs, and political leaders kept this basic principle in mind.
Check out the rest of the author's leadership series here: http://www.washingtonpost.com/blogs/guest-insights/post/leadership-character-a-six-part-series-by-west-points-col-eric-kail/2011/04/04/AGSg1DPH_blog.html