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FM 21-30: Conventional Signs, Military Symbols, and Abbreviations

Field manual 21-30 is intended to supply the information required by the map reader.

History

  • 1968-09-16: Change No. 2
  • 1965-06-30: Military Symbols [pdf]
  • 1961-05-05:
  • xxxx
  • 1945-02-28: Change No. 3
  • 1945-02-15: Change No. 2
  • 1944-04-21: Change No. 1
  • 1943-10-15: [pdf]
  • 1942-07-27: Change No. 2
  • 1942-05-09: Change No. 1
  • 1941-11-26: This revision [pdf] supersedes Training Circular No. 48, 1941, too.
  • 1939-08-01: