Marine Corps · SSN history

900 Munitions Worker, Ground

Appendix B identifies SSN 900 as “Munitions Worker, Ground” under AR 615-26 of September 1942 and its supplements, with SSNs 505, 521, 901 and 911 suggested as alternatives. Selecting a replacement required reviewing the individual’s Qualification Card against the job specifications, not automatically converting everyone to those specialties.

Codes named in this history

Other history records

These source identifiers have archive pages. Their availability does not establish current service use or retirement.

Codes without a directory match

  • 505 stated by the source. No directory or archive record matches.
  • 521 stated by the source. No directory or archive record matches.
  • 911 stated by the source. No directory or archive record matches.

Documented history

Munitions Worker, Ground

June 1945 is the manual’s publication date. No effective date for a change to SSN 900 is given.

  • No June 1945 title is listed for SSN 900; the entry does not establish a fixed split or specify whether the classification was deleted or fundamentally changed.
Source extraction notes

Predecessor title from the AR 615-26 column: Munitions Worker, Ground. Suggested conversions/remarks: 505, 521, 901, 911. The table gives no row-level effective date. June 1945 is the manual publication date, not an effective conversion date.

Source documents (1)

Reviewed September 24, 2026 against references 3 and 4.

Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.