This image displays an insignia of a rank in Royal Danish Air Force. The rules and discipline of war require that combatants be readily identified and hence this design cannot be copyrighted.
Converted by <a href="//commons.wikimedia.org/wiki/User:121a0012" title="User:121a0012">121a0012</a> using Frontline
Image and description based on <a href="https://en.wikipedia.org/wiki/Image:RDAF_Lt_Col.png" class="extiw" title="en:Image:RDAF Lt Col.png">en:Image:RDAF_Lt_Col.png</a>