MILITARY
The Federal Research Division also maintains documents from Task Force Russia, which attempted to locate Americans thought to have been held in the former Soviet Union.
Task Force Russia
http://lcweb2.loc.gov/frd/tfrquery.html
Describes how to obtain records with final data on U.S. military personnel who died as a result of hostilities (killed in action, died from wounds, died while missing, or died while captured) or other causes (injury or illness, non-hostile; other non-hostile causes; died while missing, non-hostile) in Cambodia, Communist China, Laos, North Vietnam, South Vietnam, or Thailand during the conflict in Southeast Asia.
Vietnam Combat Casualties
ftp://ftp.msstate.edu/docs/history/USA/Vietnam/combat.casualties
Links to sites for all branches of armed forces, Veterans organizations, military bases and other groups.
Military Personnel Records and other helpful sites and links
http://www.nara.gov/nara/frc/mprhelp.html