VADM James B. Stockdale Center for Ethical Leadership, U.S. Naval Academy: The mission is "to empower leaders to make courageous ethical decisions; includes an electronic edition of Ethical Leadership for the Junior Officer and Ethical Leadership for the Junior Staff Corps Officer (sponsored by the USNA class of 1964) as well as articles, speeches and videos.
Center for Character and Leadership Development: At the United States Air Force Academy, "helps align academic, athletic and military efforts...to develop leaders of character." Publishes the Journal of Character and Leadership Development.
The Lejeune Leadership Institute: "Organized to advance the study and practice of leadership excellence focusing on leadership development that is founded on marine Corps values;" branches of the Institute cover Support, Doctrine, Ethics, Professional Programs, and Civilian Leaders Development Program.
The Internet provides access to a wide variety of information - some good and some less reliable. Use care in deciding which sites to use for research. These are some tips for assessing the quality of a web site. Ultimately, you need to look for currency, relevance, authority, accuracy, and purpose.