Army · SSN history

021 Title not stated in source

Appendix I lists Army SSN 021 as deleted and gives 175, 176, 432, 433, 434, 435, 436, 437, 438, 439, 440, and 441 as suggested substitutes. These are possible replacements, not a single mandatory successor.

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Codes named in this history

Codes without a directory match

175 stated by the source. No directory or archive record matches.
176 stated by the source. No directory or archive record matches.
432 stated by the source. No directory or archive record matches.
433 stated by the source. No directory or archive record matches.
434 stated by the source. No directory or archive record matches.
435 stated by the source. No directory or archive record matches.
436 stated by the source. No directory or archive record matches.
437 stated by the source. No directory or archive record matches.
438 stated by the source. No directory or archive record matches.
439 stated by the source. No directory or archive record matches.
440 stated by the source. No directory or archive record matches.
441 stated by the source. No directory or archive record matches.

Documented history

Title not stated in source

The deletion date is not stated. June 30, 1945 is the publication date of Change 2, not an established effective date for deleting SSN 021.

The table does not name the deleted specialty or describe its duties.
No conditions for choosing among the suggested substitutes are stated.

Source extraction notes

Appendix I lists deleted SSN 021 with suggested substitutes 175, 176, 432, 433, 434, 435, 436, 437, 438, 439, 440, 441. The table does not print the deleted specialty title, so the neutral title placeholder is used. The row-level deletion date is unstated. The citation dates Change 2 to 30 June 1945; that publication date is not an effective deletion date.

Source documents (1)

Reviewed September 23, 2026 against references 1 and 2.

TM 12-427, Military Occupational Classification of Enlisted Personnel, 12 July 1944, Change 2, 30 June 1945
1. Appendix I, printed p. 147 / PDF p. 215, deleted SSN 021 · source dated June 30, 1945 · cited by the explanation
PDF page 215 (opens in a new tab)
2.TM 12-427, Military Occupational Classification of Enlisted Personnel, 12 July 1944, Change 2, 30 June 1945 · event transcription · docs/legacy-data/army-ssn-1944.jsonl:14; Appendix I, printed p. 147 / PDF p. 215, deleted SSN 021 · cited by the explanation
PDF page 215 (opens in a new tab)

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