Army · SSN history

0188 Operator, jackhammer

The listed jackhammer-operator and laborer positions under SSN 0188 were converted to Pioneer MOS 5729. For personnel occupying those positions, the conversion applied to primary or potential-primary MOS classifications.

Codes named in this history

Codes without a directory match

  • 5729 stated by the source. No directory or archive record matches.

Documented history

Operator, jackhammer

The position changes took effect on 7 November 1949; the personnel MOS conversion took effect on 1 February 1950.

  • The order establishes conversion of the listed positions, not Army-wide cancellation of SSN 0188.
Source extraction notes

The instrument prints no field-wide rescinded-code list; only its explicit appendix T/O&E position conversions are asserted here. Jackhammer-operator and laborer positions convert to pioneer MOS 5729. The 2 position-level source assertion(s) are collapsed into this one canonical predecessor event, preserving first-source successor order. Personnel MOS conversion is effective 1 February 1950; the appendix's T/O&E position amendments took effect 7 November 1949. The predecessor remains in the SSN namespace; successors are numeric MOS codes.

Source documents (2)

Reviewed September 23, 2026 against references 1 and 2.

Duty Soldier II

For Infantry ammunition-bearer or filler duties, SSN 0188 (Duty Soldier II) was to be replaced by MOS 4745 for light-weapons duties or MOS 4812 for heavy-weapons duties. This restricted 0188's Infantry use rather than abolishing it Army-wide.

The appendix's unit-position conversions took effect on 29 April 1949: paragraph 8a explicitly made them effective on the regulation's date.

Source extraction notes

Paragraph 6 restricts this SSN in Infantry use but does not rescind it Army-wide. Paragraph 6 directs ammunition-bearer or filler use to 4745 for light-weapons duties or 4812 for heavy-weapons duties; the appendix visibly instantiates 4812. Repeated position-level change-sheet rows are collapsed into this one canonical predecessor event, preserving first-source successor order. The predecessor remains in the SSN namespace; successors are numeric MOS codes.

Source documents (3)

Reviewed September 23, 2026 against references 1, 2 and 3.

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