Army · Legacy SSN

0521 Basic

Converted to 5729, effective February 1, 1950.

Documented history

Basic · Converted to 5729, effective February 1, 1950

The instrument prints no field-wide rescinded-code list; only its explicit appendix T/O&E position conversions are asserted here. Basic/filler-personnel positions convert to pioneer MOS 5729. The 4 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.

Sources

Soldier · Split into 4745, 4812, effective April 29, 1949

Paragraph 6 restricts this SSN in Infantry use but does not rescind it Army-wide. Paragraph 6 directs former ammunition-bearer/filler use to 4745 for light-weapons positions or 4812 for heavy-weapons positions. 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.

Sources

Sourced from official classification manuals and messages. Spot an error? Let us know.