Can someone out there de-mystify army patch wearing? When would one wear their division patch (the most common that I've seen) and when would you wear the army (or perhaps corps) patch? From the picture here, you can see the XO has the 7th Army Patch on his jacket but man to his left does not. Is it because the 540th did not have a division patch? Can you wear a patch for a unit smaller than a division?
We, in the Marines, try to not complicate things too much. the only thing authorized for wear on our utility uniform is rank and up to two devices (jump, pilot, or EOD wings; or scuba bubble.) On our dress uniforms you have rank and the afore mentioned devices as well as ribbons, shooting badges, and a couple of Eagle, Globe, and Anchors. This simplifies things greatly for us dumb jar-heads.