OPN in Military could mean:
Displaying 1-2 of 2 result(s).
Similar to OPN
67Y - AH-1 Attack Helicopter Repairer MOS7 WVI - 7th West Virginia Infantry Regiment
75 RGR - 75th Ranger Regiment
772EOD - 722nd Ordnance Company
7CAV - 7th Cavalry Regiment the Michigan Seventh
81 IR ILL - 81mm Mortar Infrared Illumination Round
82AD - 82nd Airborne Division
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