C-21 means Cargo aircraft model 21 Learjet in Military
Similar to C-21
11B - Military Occupational Specialty for Infantryman11z - Command Sergeant Major Military Occupational Specialty code
12 WVI - Twelvth West Virginia Infantry Regiment
121ARW - 121st Air Refueling Wing
129 RQW - 129th Rescue Wing
12N - Horizontal Construction Engineer
13 SCVI - 13th South Carolina Volunteer Infantry Regiment
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