USAFE had a handy dandy handbook for the Air Force guys stationed with the Army divisions, telling them to sew little nametags in their underware, how to get a shower at a Schwimmbad, reminding them to file a TDY voucher when they went to a meeting in Frankfurt, and how to be comfortable in the field. Most of all, they were told that they were serving a hardship tour.
The good news is that these days, the Air Force is with the Army in every fight and it makes a difference. Life is hard in the desert, but making fun of the USAF keeps it real.
My family has Air Force, Army & Marines. And my youngest was in Navy JrROTC - before enlisting in the Air Force. Makes for lots of insults at Thanksgiving, but that is OK.
My ribbons include an Army Commendation Medal and (oddly) a Navy Sea Service ribbon - although I was never at sea. But the land-based Navy squadrons got them too because otherwise it would look bad on their records for the Navy guys and the Navy gave them to us embedded Air Force guys too.
No “joint service” time though...