The National Center for PTSD is a part of the U.S. Department of Veterans Affairs that conducts research and seeks to educate the public on the prevention, understanding, and treatment of PTSD. http://www.ptsd.va.gov/
Includes "Returning from the War Zone" guides for military personnel and their families: http://www.ptsd.va.gov/public/reintegration/returning_from_the_war_zone_guides.asp