Finding WWII Rosters Online at NARA

Blog post Banner  Finding WWII Rosters Online at NARA

For researching a WWI or a WWII soldier, have you considered using the Rosters at NARA? They are located Series: Muster Rolls and Rosters, November 1, 1912–December 31, 1943 within Record Group 64. This blog post will show where to search for rosters, including how to use an online finding aid for finding WWII rosters that will make your task much easier.

The rosters are arranged in three subseries within Muster Rolls and Rosters, November 1, 1912–December 31, 1943:

  • Muster Rolls, November 1, 1912 – June 30, 1918 and Enlisted and Officer Rosters, July 1, 1918 – December 31, 1939,
  • Officer Rosters, 1920 – 1939,
  • Army and Army Air Force (Air Corp) Rosters, 1940 – 1943

The Series is located at: https://catalog.archives.gov/id/85713803

There are 625 pages of links viewing on this Series webpage, so you can browse for an organization.

First page of Series: Muster Rolls and Rosters, November 1, 1912–December 31, 1943

You can also search within the Series for a soldier’s name, military serial number, or even an organization: https://catalog.archives.gov/search-within/85713803

Search within Series: Muster Rolls and Rosters, November 1, 1912–December 31, 1943

When researching WWII soldiers, there is an online finding aid to streamline the process: https://www.archives.gov/st-louis/archival-programs/army-rosters-1940-1943

Finding Aide for Army Rosters 1940-1943 Online

On this page, you will find information about how to locate WWII rosters organized by:

  • Army enlisted service members
  • Army officers
  • Army Air Force (Air Corp) enlisted service members
  • Army Air Force (Air Corp) officers

Within those categories, the rosters are organized by type of reporting unit.

Table for RG 64, Series: Muster Rolls and Rosters, November 1, 1912–December 31, 1943 Subseries 3: Army and Army Air Force (Air Corp) Rosters, 1940 – 1943

To use the finding aid, click on the plus sign to expand the link to locate the type of unit. There will be box numbers shown, but some entries will contain links to digitized rosters, or to a pdf that contains the National Archives Identifier (NAID) in NARA’s Catalog to use when locating the online rosters.

In this example, I am searching for the rosters for a soldier in Battery A of the 500th AAA Gun Battalion, so clicked on the plus sign next to “Chemical and Antiaircraft Artillery” to expand the section.

Finding aid webpage for AAA Battalion rosters

I licked on the link for “Antiaircraft Battalion – Boxes 246-348.”

The link led to a PDF file with the Catalog NAID.

https://www.archives.gov/files/antiaircraft-artillery-battalion-index.pdf

The PDF file shows that the rosters are stored by increasing NAID numbers, by the number of the organization.The first page contains the column headers. (They are not repeated on subsequent pages.)

Finding aid file for AAA Battalion rosters

Scrolling down to the beginning of page 4 of the PDF, I find Btry C, 500th AAA Gn Bn, 1943. That means Roll Number 307 (2 of 3), which begins with Battery C of that Battalion has NAID Identifier 371744319.

Finding aid file for 500th AAA Battalion rosters

Since the soldier is in Battery A, I will want to check the previous part of the roll, listed at the bottom of page 3 of the PDF, NAID 371744318, Roll Number 307 (1 of 3). I would expect that rosters for Battery A would be closer to the end of the Roll. (Remember to use the Chrome Browser to see the images in order, as Firefox has a documented bug of showing images in reverse order.)

I searched from the NARA Catalog Home Page: https://catalog.archives.gov

Roster Roll for 500th AAA Battalion

There is a blank page between the months, so I began by checking the image after the blank pages in the image range of 800-900.

I recommend building a list or a table with the information for the organization, to keep track of links. (Note: Organization and Link appear in the same column for readability. In my Excel worksheet, they appear in separate columns.)

Table for tracking Roster images, links and dates

I would want to continue to go backwards chronologically to collect the rosters for the time the soldier I am researching was in the Battery.

Another option, as described in our blog post about locating WWII Morning Reports in PDF Files can also make the task easier. Search the NARA catalog for: 371745320, which is the NAID for the final part of the Roll Number 307, part 3 of 3.

PDF files of images available for download

From there, the PDF files containing groups of 125 images from the Roll can be downloaded. Images for Battery A can be found in the files Roll-0307_07.pdf and Roll-0307_08.pdf

Give it a try and let me know how you do!

More WWII Morning Reports in the NARA Catalog

Blog banner - More WWII Morning Reports in the NARA Catalog

It should not be a surprise that to anyone who has read my most recent book Finding and Using U.S. Army WWI and WWII Morning Reports: A Research Guide for Historians and Genealogists or seen my presentation about Morning Reports that I periodically check the NARA catalog. Specifically, I have been checking to see if reports later than July 1944 have been uploaded. Today I searched, and success!

As a reminder, I search from the main catalog page at https://catalog.archives.gov/ so that I can benefit from the links to the search terms in the results. To see if more Morning Report are available I search for terms such as: “Morning Reports” AND “October 1944”

This time there were results! I kept searching, and Morning Reports up to December 1944 are available. (Search terms: “Morning Reports” AND “December 1944”) I did check for any from 1945, there were no results (yet!).

Of course, I did search for my father, by name and by serial number. This time I did find a mention of him. My brother was the first to know of this find, grateful that this was not a middle-of-the-night call!

For tonight, I will share that SGT James C. McMahon appeared in a Morning Report for 13 October 1944, still in Narsarssuak, Greenland. July 1944 had left me with a cliffhanger, and this record provided data about two military organizations with which he served after the 500th AAA Gun Battalion left Greenland.

Morning Report 416th Base Hq & Air Base Squadron, 13 October 1944

I will post about my continuing research as I use Morning Reports to reconstruct my father’s WWII service. From here, I will be busy moving forward and backward in time to track what was happening in Greenland.

Thank you to NARA! Good luck searching, and let me know how you do!

NCGS Fall Conference 2025

Blog Post Banner NCGS Fall Conference 2025

Recently I had the pleasure of presenting at, and attending, the North Carolina Genealogical Society Fall Conference 2025. The Conference was very well planned and organized at a wonderful venue with great food. As much as I appreciate the reach of virtual presentations to give presentations at many places far from where I am based, it was nice to be with a group of genealogists, learning and chatting.  

At the Conference, I presented sessions about Military Research and Artificial Intelligence (AI). When speaking about military research, I always customize my presentation to include finding military records for the location of the audience. North Carolina has great resources, both in person and online!

NCGS Military Presentation - Cover

With a Ph.D. in Computer Science and Engineering, I am always reaching deep into the technology of AI to learn its inner workings, and to then share an understanding of how it works and how to use it. As a graduate school professor in cybersecurity, and having tested computer code used on military aircraft for years, I also have a perspective about what we should be concerned about and what can go wrong.

Ancestors, AI and Prompt Engineering NCGS - COVER

What was also fantastic about the Conference was that people could attend the lectures virtually. The NCGS members and technical staff streamed the presentations and recorded them for attendees to watch later. I knew everything was working when questions from online viewers came during the lectures and insightful questions via email were waiting when I returned to my hotel.

Even though my research in North Carolina is limited to a few months during WWII at Camp Davis, I did attend J. Mark Lowe’s presentation, “Creating North Carolina Local and Regional Locality Guides.” (Mark’s smile is even bigger in person!) The presentation definitely had information that I will carry forward to the places where I do research. I will never look at detailed maps the same way again.

I attended another terrific presentation about using DNA to solve maternal surnames by Kate Penney Howard. Jon Smith’s workshop about using AI for creating locality guides certainly shifted my mindset from the free form text I have been using, and his tips about using Gemini in Chrome tabs were game changers. Thankfully the presentations were recorded so that I can enjoy Diane L. Richard’s presentation about Researching Your Ancestors as Kids. (Diane and I share an educational experience: Go RPI Engineers!)

The beginning-to-intermediate artificial intelligence presentation I gave on the first morning may have provided a warm-up for Steve Little’s intermediate artificial intelligence presentation. It is always interesting to see how other genealogists are using AI tools, and how its use is gaining acceptance. Promise to keep checking your output and stay sensitive to privacy concerns!

Thank you to everyone who planned and worked on making the 2025 North Carolina Genealogical Society Annual Conference such a great experience, to the audience members who shared their time with me, and all the other instructors and attendees for a rewarding and fun time!

NCGS 2025 Fall Conference

NCGS Fall Genealogical Society 2025 Fall Conference ad

Will I see you there?

I am excited to be invited to present in person and online!

On Friday, I will be presenting Ancestors, AI, and Prompt Engineering.

NCGS Fall Genealogical Society 2025 Fall Conference McMahon AI

On Saturday, I will be presenting a Crash Course in Researching Ancestors in the US Military.

NCGS Fall Genealogical Society 2025 Fall Conference McMahon Military Research

There are great speakers, and great talks, Friday and Saturday. There is also an optional Beginner Day on Thursday, featuring four lectures just for beginners!

NCGS Fall Genealogical Society 2025 Fall Conference Beginner Day Ad

Researching Morning Reports

Have you every heard that you should be using Morning Reports?

A book has finally arrived to show how you can travel back in time through locations and events, day by day, with a U.S. Army soldier or organization during WWI or WWII military service.  With Morning Reports, you can overcome and potentially go beyond burned Army personnel files! Pursue references for a specific soldier, then leverage daily records when not named or identified.

This book introduces techniques for locating Morning Reports and what is and is not included. WWI and WWII formats are described in detail, with examples allowing the reader to experience the WWII Morning Report language and abbreviations by utilizing the web, Fold3 (WWI) and the NARA catalog (WWII). The reader will discover tips for locating elusive reports and strategies for working around missing records. Useful case studies combine reports across parts of a military organization and place a soldier into the context of history.

This book contains a bonus chapter about the daily reporting for other branches of the military!

Historians will find the search techniques and pointers to additional records useful as they track a soldier or organization through a world war.

Our new book is available on Amazon at https://www.amazon.com/Finding-Using-U-S-Morning-Reports/dp/B0FPBDVN9M

If you are interested in having Dr. McMahon speak at your society about Morning Reports, or other presentations, please contact us: https://aweekofgenealogy.com/contact-us/

Topics at: https://aweekofgenealogy.com/presentations/

Reviews are at: https://aweekofgenealogy.com/comments/

US Navy Log Book for Pearl Harbor 1941

Blog Banner Navy Yard Log Book for Pearl Harbor in 1941

If you have read our WWI military research book, Researching U.S. WWI Military Members, Military Organizations and Overseas Noncombatants: A Research Guide for Historians and Genealogists (Research Guides for Historians and Genealogists), you know that the Navy uses Log Books. The Log Book for the U.S. Naval Navy Yard at Pearl Harbor that includes 7 Dec 1941 has been located! Apparently it was found in a dumpster in California, then held by a family for many years. A digital copy of the Log book can be found at: https://catalog.archives.gov/id/552663772. On Image 286, at the bottom of the page for 6 Dec 1941 you can see the beginning of the notes about the attack.

Remember that it is best to use a browser other than Firefox to see the image pages in order. If you choose to download the PDF file, know that it is over 1GB in size. You might want to read it online and download only the pages of interest.

Read accounts from the ships’ Log Books in NARA’s Prologue Magazine at https://www.archives.gov/publications/prologue/2011/winter/ph-decklogs.html

An article about Log Book can be read at: https://www.militarytimes.com/veterans/military-history/2025/08/18/navy-logbook-that-recounted-pearl-harbor-recovered-after-84-years/

You can see our other books at: https://www.amazon.com/stores/Margaret-M-McMahon-PhD/author/B01EMD8J62 (Always look for the latest versions.)