Executive Meddling: Red Alert 3's DRM ,which was one of the reasons why the game was (along with forgetting in some copies to add the 20th cd-key digit) a failure in terms of profit, apparently it was this economic failure along with the resources lost in Tiberium what convinced EA executives to make Tiberian Twilight.
The Soviet Union is led by an Englishman and their top scientist is a Swede. Krukov's actor is an American of Russian descent. Dasha is probably Russian (her last name suggests she could be Ukrainian). Actress Ivana Milicevic (pronounced "Mil-ee-savich") is a Serbian immigrant who grew up in the United States.
Everyone in the Empire of the Rising Sun appears to be Chinese, save for the Emperor himself. Kelly Hu is also of Hawaiian descent, which makes her of Japanese descent in this timeline. Then there's Takara, played by Jamie Chung, who is ethnically Korean.
McLeaned: Actor Nicholas Worth, who played Premier Romanov, died a year before Red Alert 3 was released. The game explains his absence by saying he has fled.
Players unfamiliar with the game may get a bit of nostalgia when they first hear of the name "General Krukov", which is one letter away from the famous traitor "Kukov" from RA1. Turns it out may have been intentional, as guess who betrays you about halfway through the Soviet Campaign?