As most collectors know, the military uses MOS codes (Military Occupational Specialty). You can find these on personal documents, morning reports and more. In some cases you have no idea what the code means, to help you out we have composed a list of MOS Codes used in the US military during World War Two. We hope you find this helpful!

The MOS codes were used to verify specialties of military personnel. For Enlisted Men, codes had a 3 digit number. Codes below 500 are corresponding with civilian occupations (like a mechanic) and codes above 500 are used for specific military occupations (like a machine gunner).

For Officers, codes are a 4 digit number.