Note that the F-20 (aka F-5G) was intended (in 1975) to be a USAF fighter, but the F-16 won the battle of the dollar$ ... here's more info:
http://en.wikipedia.org/wiki/F-20_Tigershark
As an old F-5A/B jock, I would have given my left testacle to have the privilege of flying the F-20 ... arguably the "best jet ever designed and built", but my USAF bosses weren't quite open-minded enough, so we had to settle for F-16s (which wasn't so bad, actually).
You won't find too many "Army jet(s)" out there. Search the swap pages and you'll find the USN F-18. The latest I downloaded from the swap pages in just the last couple of days is attached for your convenience. I edited the smoke a bit, which you can change back to your liking. I believe it's originally from
Opjose at
https://forums.realflight.com/showpost.php?p=50954&postcount=16, but you'll find other editions of it in the swap pages as well.