That's how it's always been in any of the services. I can remember going to Da Nang Main during my Vietnam days looking for jeep parts. The army either didn't have what we needed or wouldn't part with it. My first sergeant and I walked into an air force office and ran down the NCOIC. They exchanged pleasantries, got down to business and we got what we needed. The Top had to trade something (I honestly don't remember exactly what it was. Probably a ChiCom pistol or flag) the air force dude wanted, but the c.o.'s jeep was fixed.