History
Dimitri Semyanov was a member of the crew of the Soviet submarine Leningrad which was sunk by Magneto after an attempted attack on it. All crew members died as a result of the sinking.[1] Years later, Dimitri's father, Colonel Yuri Semyanov, head of a UN mission in the Savage Land, despite Magneto in that case being their ally against Zaladane and his forces, attempted to avenge his son's death by attempting to kill Magneto.[2]