I know. I did a lot of joint duty, and still heard it a lot. It was never said in anger, though, and we gave it right back.
Some of my best times where at the Fort Myers NCO club on a Friday afternoon/night, where we’d all hangout, Soldiers, Sailors, Airmen and Marines. Gals and Guys, and even a few officers who were cool would also get an invite now and then.
We were all basically all comms/computer people in the lowest basement of the Pentagon, working for the Joint Data Systems Support Center, although the Marines said they were riflemen first, which to a degree was true, but their skill as comms tech better served the Marine Corps, and Corps knew this as well. I’ve never heard of Marine pulled from a comms role to hump a rifle through the boonies filled with bad guys, except in training.
Yeah - Joint duty here too. Including working with Canadians and Saudi’s (Iran/Iraq war)....Saudis were the worst. Run around with hair on fire, inclined to shoot first, then figure out if it was the right target. They wanted to target a commercial airlines once...was sitting on the scope and had to convince them it was indeed commercial from the flight path I recognized. I sympathized with the Navy when they actually did shoot one down. I had separated from USAF before that.
But as far as US forces, we did enjoy the good natured rivalry. We were a team when it came down to business.
The Canadians got drunk and wanted a fistfight....lol
Fun times ;-)