The National Archives Catalog contains far more than the well-known Army Morning Reports, Casualty records, photographs, maps, movies, and unit records. What most genealogists and military researchers do not know is that hidden among millions of digital records are what many researchers call ‘Helper’ files.
These are records that provide context, supporting evidence, unsent letters, newspaper clippings, and official military documents for American airmen, airplane crews, and soldiers, who found themselves behind enemy lines. In some cases these ‘helpers’ treated wounds or illness and then had to turn the Allied ‘enemy’ over to the Germans. In other cases, they helped these individuals return to safety behind Allied lines.
The ‘Helpers’ were found in most European countries and some of their records have been digitized on NARA Catalog. In these you may find official military reports, correspondence written by Allied airmen and soldiers which went unsent, casualty lists, operational documents, and administrative files.
These records may shed some light on family stories that other records could not prove true or false. They may uncover personal information the family never received. Researchers may also discover context to that period of time where an airmen was taken care of in secret and was not documented, or no longer exists, in American military records.

The document above is part of the Norway-Sweden-Denmark-Switzerland File Unit within Record Group 498: Records of Headquarters, European Theater of Operations, United States Army (World War II)
Series: Records Relating to Polish, Swiss, Danish, Yugoslav, and German Helpers
NARA Catalog ‘Helper’ Files
Here are a few of the ‘Helper’ files, which can be found in RG 498: Records of Headquarters, European Theater of Operations, United States Army (World War II)
Case Files of Belgian Helpers, 1945–1947
Correspondence and Related Records Pertaining to Hungarian Helpers, 1945–1946
Case Files of Luxembourg Helpers, 1945–1947
Final Interrogation Reports, 1945–1946
Reports About Helpers and Betrayers, 1945–1945
Are You Ready to Explore?
NARA Catalog contains a wealth of information for researchers willing to explore beyond a name search and the basic genealogy sites. I am constantly amazed at what I discover there. Remember, much of what is held at NARA College Park has yet to be digitized. Can you imagine the depth of information still sitting on shelves at the archives?
By combining these ‘Helper’ files with personnel records, Individual Deceased Personnel Files (IDPFs), Army Morning Reports, Escape and Evasion Reports, Prisoner of War Records, and other archival sources, researchers can build a far more complete and accurate picture of a veteran’s World War II story than any single file can provide. Plus, you may just find answers to family stories or whispers about experiences your veteran would not talk about but changed his life…and eventually yours.
Would You Like to Learn More?
Grab a copy of my 5 PDF Researching WWII Toolkit for even more NARA Catalog resources.
If you would like to learn how to research, click here to see upcoming small group coaching sessions to learn how to use Fold3, NARA Catalog, research Army or Navy service, find POW records, and more. These sessions come with extensive workbooks, plenty of Q&A for attendees, my 2-part research strategy and the replay. Need a researcher? I am taking research and book clients – email jennifer@ancestralsouls.com to set up a free consult to discuss your project.
© 2026 WWII Research and Writing Center






