Army · MOS history
Converted to 21B, dated September 1, 2004 by the source.
Historical steps
The source names a code the branch later retired, or whose reviewed record is historical. Its story continues on that code's own page.
Recorded successor: 12B Combat Engineer, also listed in today's directory
Combat Engineer
DA Pam 611-21 Table 10-4 maps predecessor MOSC 12B1 to 21B; source successor entries: 21B COMBAT ENGINEER; conversion effective 01 Sep 2004.
1. Table 10-4, PDF p. 224 · source dated 2025
PDF page 224 (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.