
Returning to the present, Tatsu was horrified to see that not only do the Allies and Soviets still exist, but in an ironic repeat with what happened with Cherdenko, a new fourth world power called the Celestial Empire now rules over Japan.

As the Empire of the Rising Sun's ambitious plans of dominating the Western hemisphere started to crumble, the nation's leading weapons manufacturers. Based on the Empire's VX technology, the Giga Fortress is capable of transforming between a heavily armed Sea Fortress mode and a flight-capable Air Fortress mode. Having outlived his usefulness, Tatsu erased Möngke Khan from the timeline and destroyed their technology, leaving the now leaderless and overextended Mongol Empire to tear itself apart. The disturbingly strange Giga Fortress is a massive, aerial and naval war machine. Under Tatsu's orders, the Mongols went on a rampage across the entirety of Medieval Europe, leaving a path of destruction that Tatsu hoped would prevent the rise of the Allies and the Soviet Union in the future. Tatsu presented himself as a god and supplied the Mongols with their advanced technology.


The Imperials went back in time to the middle ages and saved Möngke Khan from a fatal cannonball that would have killed him. After the Empire of the Rising Sun's defeat and the death of Emperor Yoshiro at the end of Red Alert 3, Crown Prince Tatsu and a group of loyal Imperial scientists used stolen Soviet blueprints to create their own time machine.
