How do I obtain from NARA database USMC Vietnam War casualty data aggregated by unit (battalion and regiment) and time period e.g. September 1965 thru September 1966?

The Defense Casualty Analysis System has generic numbers of Hostile and Non Hostile Casualties, but it does not aggregate the data by unit?

Dear Mr. Stevenson,

Thank you for sharing your question with the History Hub.

The U.S. Marine Corps information you are looking for is most likely part of the National Archives’ Coffelt Database. From that page in the National Archives Catalog, you can search the file online using our Access to Archival Databases (AAD) system. To search the data file, simply scroll to the “Online Resource(s)” section and click on the AAD link.

More Statistical Information about Casualties of the Vietnam War can be found on our website; this page contains information about the Vietnam Conflict Extract Data File and about the Defense Casualty Analysis System (DCAS) Extract Files mentioned by Mr. Tomko. You can also find an overview of Online Military Records in AAD and an outline of electronic resources related to U.S. Military Casualties, Missing in Action, and Prisoners of War from the Era of the Vietnam War online.

Best of luck in your search, and thank you, again, for posting your question to the History Hub.

This is interesting, because after reviewing the Defense Casualty Analysis System, I noticed how it is aggregated into Hostile and Non-Hostile.  They had an Airman who was a casualty in 1985 due to a Red Army terrorist bombing at the airbase at Frankfurt W. Germany, listed as an "accident". Actually have a FOIA response from the DOD with the print out, listed as an accident?