CPO1 means Chief Petty Officer First Class in Military
Similar to CPO1
11AD - 11th Airborne Division11B - Military Occupational Specialty for Infantryman
11z - 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
View all in Military