He wished to defect to the Allies and bring the Super Tank designs to their cause, so thus he reprogrammed the tanks to fight for the Allies. But due to a mishap, they began destroying everything they perceived as a threat until they were successfully reprogrammed for Allied use. He meanwhile had taken refuge in a nearby civilian town to await any form of evacuation.
Demitri is escorted out of village under the cover of the Super Tanks rampaging inside the Soviet base, and evacuated by a Chinook, under the player's supervision.
Demitri appears in the Aftermath expansion pack.