WWII Army serial # letter prefixes

Dear Ms. Collins,

Thank you for posting your request to History Hub!

Army Regulation No. 615-30 dated February 12, 1942 has an explanation of the Army Serial numbers for enlisted personnel and lists a few of the letter prefixes in the changes to the regulation. Correspondence in the Legislative and Policy Precedent Files, 1943-1976 under File  593-121 contains even more listings of the prefixes. For access to these documents, please contact the National Archives at College Park - Textual Reference via email at archives2reference@nara.gov.

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