As the article mentions there, the entire timeline of the Red Alert series came about due to Hitler being erased from history. Without him rising to power, Germany joined the Allies but it turned out he was what kept Stalin in check. Without him, the Soviets didn't join the Allies and instead went to war with them.
However Red Alert 3 undoes this again by Einstein being ereased from history. He was gone, Hilter was still gone, but the Allied/Soviet war still happened, albeit differently and the Japanese became another super power.
Reading that back, it wouldn't look out of place as the plot for an episode of Doctor Who.
