Cold War Crisis (CWC) is a Command & Conquer Generals Zero Hour total conversion. It takes place in the 80s, and features infantry, vehicles and aircraft of that era.
Very detailed and high quality mod featuring singleplayer and multiplayer, attempting to make the game way more realistic - while the NATO/US vs USSR scenario is alt-history, the units present are based on real vehicles of the period. Everything from tech trees and mechanics to environments and interface is reworked, which is a great amount of effort.
In general, the thing feels a lot like Company of Heroes or World in Conflict in many ways - there are areas to capture, infantry is crucial but only good when in cover... only problem is that thing is quite micro-intensive. As a matter of fact, with the game's interface being rather inflexible, it's a major pain going trough different unit types to order them to go prone and such, which really takes away from tactics as you mostly have to deal with ordering infantry to go prone and such a bit too often. It's a great mod, but while it attempts to imitate some wonderful RTS/RTTes, it borrows their aspects which are really cumbersome to execute in Generals.