Well, I'm biased, but:
https://www.matrixgames.com/game/john-ti...ign-series. JTCS also has a middle east game, quite a few mods (WWI, Viet Nam, Korea, and even a sci-fi one). The development team is currently working on a Viet Nam version that will utilize a new coding system to the game engine and a new Eastern Front early war that will do the same.
Note that the current JTCS game is no longer in support by the devs, so support will come from forum member here at the Blitz or at Matrix Games. The CS forum here is pretty active, so you should be able to pick up some opponents fairly quickly.
Good luck with whatever you choose.
Scud
Resolve then, that on this very ground, with small flags waving and tinny blasts on tiny trumpets, we shall meet the enemy, and not only may he be ours, he may be us. --Walt Kelly