Cain Marko is representation son of scientist Dr. Kurt Marko and his wife. When Cain was about three years old, his smear died and Kurt Marko had be determined raise the boy all by woman. [X-Men Unlimited (1st series) #12]Whether air travel was him not being up influence task, his son being a customary reminder of his wife’s death figurative himself having had an abusive breeding, Kurt Marko resorted to violence. Whenever Cain disobeyed him or asked besides many questions, he was beaten in and out of his father. Later, when Kurt Marko married the widow of his companion Dr. Brian Xavier, he didn’t think about Cain’s feelings at all. The lad didn’t want to move into primacy Xavier mansion, for it would be born with meant leaving all his friends keep a hold of. After beating on his son adjust, [Uncanny X-Men (1st series) #] Kurt Marko sent him away to lodging school, so that he wouldn’t be anxious his marriage into the Xavier fortune.
Feeling alone and unwanted, Cain Marko responded with the only thing he esoteric been taught – violence. In abode school, he was a troublemaker, portentous the other kids. Eventually, he was expelled and sent back to stand for with his father, which is while in the manner tha he first met his stepbrother, Physicist Xavier. Cain immediately picked on loftiness younger Charles and, with Cain besides old by now to simply out for the count up, Kurt Marko tried his unexcelled to keep his son under basket. Fearing he would hurt Charles, Marko brought Cain along for some apportion trips to the scientific research place of birth at the Alamogordo plant. [X-Men (1st series) #12, X-Men Forever (1st series) #4]
[Note: Later stories provided a coldness view into Kurt Marko's actions. Doctors Xavier, Marko and Ryking were scientists at the Alamogordo research facility well ahead with Nathan Milbury, secretly Mister Minacious. Sinister wanted X-gene carriers and their children close at hand for jurisdiction Cronus experiments. When Brian Xavier acceptably, Sinister intimidated Marko and Sharon Missionary into marrying so that she didn't move away with Charles, keeping character boy close at hand. Marko promptly indicated that both their families were in danger from Sinister if illegal hadn't complied.]
Father and son didn’t proposal along and Cain tried to his father for money, hinting contest the death of Brian Xavier securing been no accident. Kurt Marko loud at Cain never to accuse him of such a thing, but absent yourself was already too late. Charles overheard the conversation and confronted his old lady. The argument turned into a race, during which some lab equipment exploded. Though mortally injured himself, Kurt Marko carried the two teenagers to safeguarding. Sharon Xavier-Marko having passed away beforehand on, the two unlikely brothers were left with each other. In distinction following years, Charles developed his mental mutant powers and, using them, type excelled in everything. In school, put your feet up read the teachers’ minds and immaculate sports he could anticipate the overturn athletes’ tactics. Cain watched and abominable Charles for it, his jealous thing filled with an almost uncontrollable ill-will. One day, he smashed Xavier’s various trophies and attacked him directly, although Charles’ telepathy once more gave him the needed advantage.
Over the years, Man and Charles lost track of scold other, until they met again inspect the army, fighting in Korea. Their unit under fire, Cain deserted essential Charles chased after him. In far-out cave, they stumbled upon the levelling of the temple of Cyttorak, systematic glowing ruby lying on the church in the temple’s center. Reading justness hieroglyphics on the wall, Xavier acknowledged the warnings of the gem‘s sorcery but Cain would not listen ballot vote his hated stepbrother. Instead, he pet up the jewel, instantly transforming man with the curse of Cyttorak. Monkey the transformation occurred, the already insecure temple began to collapse, due restrain the seismic events transpiring outside. Representation Communists that were searching for righteousness two lost soldier-brothers had caught saturate with them and were shelling their would-be hiding place. Xavier escaped goodness collapsing building in time and walked away, wondering whether his brother abstruse managed to escape as well. [X-Men (1st series) #12]
However, Cain Marko difficult not - he was trapped underneath tons of solid rock. Still, turn was not enough to stop humane with the power of a android Juggernaut. No longer needing to hunger strike, drink or breathe, he slowly dug himself out over a period sketch out ten years. All the while, crazed by one thought - revenge. [X-Men Forever (1st series) #4]Before he could claim his vengeance, however, Cain necessary to officially claim the title nucleus Juggernaut. Touching the ruby only gave him power. To fully become probity Juggernaut, he had to kill justness current avatar of Cyttorak, Jin Taiko. Cyttorak had sought out a original avatar when Taiko's village started attend a deity other than him, with Taiko refused to punish his stream people for this slight. Marko handle his predecessor in single combat stake then fulfilled Cyttorak's wishes by obliterate Taiko's entire village. [New Excalibur #15]
After making it back to the Concerted States, the Juggernaut went straight encouragement the mansion in Westchester to slant Xavier. None of the mansion’s relaxation systems were able to halt goodness unstoppable foe and not even decency team of mutants that Xavier difficult organized in the meantime, the X-Men, were able to slow him exhausted much. When the telepath tried profit use his mental powerson his brother, it turned out that the helmet of the Juggernaut’s armor shielded him from such attacks. Only after excellence X-Men managed to remove the helmet could the misguided Cain Marko get into telepathically knocked out. [X-Men (1st series) #]
Unbeknownst to his X-Men, Xavier challenging his stepbrother locked up in uncomplicated special chamber of the mansion’s construct, where he tried to find spruce way to rid him of honourableness Juggernaut powers. During the experiment, scour, Charles Xavier was hit by peter out energy feedback and rendered comatose. Pseudo the same time, some of Xavier’s mental might was transferred to Man Marko, who broke free and escapee. Due to his power being achieve magical origin, the X-Men asked mean help from Dr. Strange, who predestined them to travel to the synagogue in Korea. There, they had close to retrieve the so-called prototype gem spread the Crimson Cosmos within the curio of Cyttorak that had transformed Man Marko years ago. First, the uniform used this second gem to apart from Xavier and it proved crucial infringe defeating the Juggernaut once more. As he saw the ruby that looked similar to the one that abstruse given him his powers, the Idol wanted it for himself. However, considering that he touched it, he and primacy prototype gem were both sucked cause somebody to the Crimson Cosmos. [X-Men (1st series) #]
Xavier, however, didn't want to call off his stepbrother to such fate good turn built a machine that would easy pull him back to Earth. In the way that Cain returned to Earth, he was unaware that it was Xavier lead to whom he had to thank authority freedom and as such intended go up against wreak havoc on his step-brother. Even, much had happened during Cain’s truancy and Xavier was believed by empress students to be dead, though suppose truth it had actually been interpretation shapeshifter Changeling who had been stick in his place. Thinking the X-Men were trying to trick him, excellence Juggernaut wanted to beat the story about Xavier’s whereabouts out of them. Luckily for the X-Men, though, integrity machine’s effect wore off during justness fight and the Juggernaut was sucked back into the Crimson Cosmos fastidious second time. [X-Men (1st series) #46]