AFSO 21 means Air Force Smart Operations for the 21st Century in Military
Similar to AFSO 21
1MX - 1st Battalion The Middlesex Regiment1NCD - 1st Naval Construction Division
1SG - First Sergeant
1st - IOC 1st Information Operations Command Land
1WVI - 1st West Virginia Infantry Regiment
1WVLA - 1st West Virginia Light Artillery Regiment
2 WVI - 2nd West Virginia Infantry Regiment
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