The largest & longest running C&C mod ever has finally been released after 10 years in development! D-day is a mod for RA2:YR which completely changes the whole game into a gritty WWII environment. This beta includes six different sides (America, Britain, France, Soviet Union, Germany & Italy), with roughly 580 units and 180 buildings between them. There are also 240 civilian vehicles & buildings too occupy or destroy. This is a beta tho and as such some features are missing and/or incomplete.
You can download it via ModDB
You will also need to Ares to play D-day, see the readme in the download or visit the site for more information