CSLA Mod was founded in late 2001 by Leon and Maa. Abbreviation CSLA come from Československá Lidová Armáda (Czechoslovak People's Army). Original authors (Leon was Czech, Maa was Slovak) wanted to make something touching both nations, and since original OFP took place in 1985, they chose the army of former Czechoslovakia.
Great mod with quality almost as high as the game itself. Comes with two very good campaigns, plenty new missions and dozens of very well made CSLA, USSR and US units and weapons.
Must play
I played a lot, really a lot of mods for OFP, I spent the few days of playing time. And he says that this mod is in the Hall of Fame along with FDF and VTE.