Strike Fighters was another one that was a pretty good for its time. Although its not located in the vietnam theatre it encompasses alot of the technology used between the korean and vietnam conflicts.
http://www.gmxmedia.net/strikefighters/
================================================== ===
Jet combat simulation game set in the 1960’s when aviation technology was still primitive but advancing at a rapid pace.
Fly 10 legendary fighters from the early jet age, each meticulously rendered to every detail. Choose from F-100D Super Sabre, 4 versions of A-4 Skyhawk (A-4B, A-4C, A-4E, and A-4F), and 5 versions of F-4 Phantom II (F-4B, F-4C, F-4D, F-4E, and F-4J).
3-D virtual cockpits with working gauges and dynamic lighting effects.
Engage in blood-draining, G-pulling, action-packed dogfights against 10 different types of enemy, including MiG-17 ‘Fresco’, MiG-19 ‘Farmer’, MiG-21 ‘Fishbed’, Su-7 ‘Fitter’, Il-28 ‘Beagle’, Tu-22 ‘Blinder’, and An-12 ‘Cub’.
Random mission generator for maximum flexibility and replayability.
3 new campaigns featuring high-flying combat action over fictional Middle Eastern sands. Campaign missions are randomly generated for different outcome each time.
Fully scalable difficulty options to challenge both novice and expert pilots.
Open architecture for future expansions and user-mod support. Download thousands of user-created skins, aircraft, terrain, missions, campaigns, and editors already available on the Internet for the original Strike Fighters: Project 1.
================================================== ===