OPN in Military could mean:
Displaying 1-2 of 2 result(s).
Similar to OPN
21CLWTLD - 21st Century Land Warrior Top Level Demonstration24 MEU - 24th Marine Expeditionary Unit
24NAF - 24th Numbered Air Force
26PEMR - 26th Pennsylvania Emergency Militia Regiment
278 ACR - 278th Armored Cavalry Regiment
2AD - 2nd Armored Division
2E - Role 2 Enhanced
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