Marine Corps · SSN history

503 Liaison Agent

Appendix B identifies SSN 503 as Liaison Agent under AR 615-26 (September 1942 and supplements) and suggests SSNs 636 or 645 as alternatives. These were not automatic conversions: each individual's Qualification Card had to be reviewed against the manual's job specifications to determine the appropriate classification.

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

  • 636 stated by the source. No directory or archive record matches.

Documented history

Liaison Agent

June 1945 is the manual's publication date, not an effective conversion date. No effective date is given for this entry.

  • No June 1945 title is listed for SSN 503; the suggested alternatives do not establish a fixed split or automatic replacement.
Source extraction notes

Predecessor title from the AR 615-26 column: Liaison Agent. Suggested conversions/remarks: 636, 645. 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.