they had:
some Mi-24's from some country in the mideas
a tarantul-2 from the DDR navy (now in some museum in the US)
MiG-21's (as YF-110) and Mig-23's (as YF-113) bought somewhere under the 'Foreign Materiel Acquisition/Exploitation' program
And the F-18 agressor squadron is part of the navy. they have a color scheme like the one used on the Su-27
THIS Mi-24 flies in the USA for the US airforce. It's used for crew familiarisation so they can learn the weak and strong points by flying it