Marine Corps · SSN history

651 Platoon Sergeant

Appendix B identifies SSN 651, titled Platoon Sergeant in AR 615-26 (September 1942 and supplements), as deleted for Marine Corps use. Its instruction, “Appropriate SSN,” required review of the individual’s job and qualifications to select a replacement specialty.

Documented history

Platoon Sergeant

No effective date for the deletion is given. June 1945 is the manual’s publication date, not a stated conversion date.

  • No fixed successor code or automatic split into numbered specialties is specified.
Source extraction notes

Predecessor title from the AR 615-26 column: Platoon Sergeant. Suggested conversions/remarks, as printed: Appropriate SSN. Chapter I section 13 identifies Appropriate SSN as a deleted classification requiring individual job review because the old SSN does not provide enough information to recommend a fixed substitute. No numerical successor is invented. The table gives no row-level calendar effective date. June 1945 is the manual publication date, not an inferred individual 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.