Some time before the events of Operation Meteor a project was developed to saveguard the genetic legacy of 'Heero Yuy' as well as the createion of a genetically superior soldier that will also share his abilitys self-discipline, extreme body control and ability to reason , in the case he is lost to the world. This project was given permission by Heero but he was never told the true meaning behind it.
After many failures then several months later a surrogate mother gave birth to the so-called 'twin wolves' the clone considered to be genetically "superior", Itachi will be known as Liquid Wolf. While the "inferior" clone , Sasuke will be known as Solid Wolf. Then sometime later in a more secret project a third clone was made , Eli also known as Solidus Wolf. This was the result of the Les Enfants Terribles project funded by Doctor Jay Null who was also a Gundam engineer.
The Les Enfants Terribles children possessed enhanced natural abilities and durability, surviving and withstanding physical and mental situations that would result in an average human's death or mental breaking In addition , the Les Enfants Terribles project also resulted in the children having a heightened and natural aptitude with piloting vehicles.
During this time another type of gundam is being developed and created
Transformable Assault Ground Mobile Suit , Gundam Rex
Transformable Assault Amphibious Mobile Suit , Gundam ray
Assault Space Mobile Suit , Gundam Genesis
To supplement the abilities of the Les Enfants Terribles project the ZERO System was also developed to interface the pilot and machine. With many fail tests it is concluded that it is perhaps only the chosen three can make any use of them while others went completely insane after using the ZERO system.
It is now A.C. 195, shortly before Operation Meteor began, word leaked that Vice Foreign Minister Darlian had learned about the plan. The Barton Foundation sent a hit team to assassinate him upon his arrival at one of the L1 colonies. Doctor J offered the boy three options: Aid the assassination; prevent the assassination; or ignore the whole thing. The boy ended up choosing the second option and saved Darlian's life. Later, as the boy visited the makeshift grave he had made for the little girl, Doctor J informed him that they would indeed be carrying out Operation Meteor as Dekim decreed it , which would have resulted in the deaths of numerous innocent people due to the plan's inclusion of dropping an entire colony onto Earth.
Once more, the boy was given three options: Go along with the genocidal plan; kill J and run away; or change the plan altogether.
On April 7, A.C. 195, the young man climbed into the cockpit of the Wing Gundam, intent on carrying out his own version of Operation Meteor by attacking OZ facilities directly and thus cripple the Alliance of its weapons and mobile suits. As he prepared to depart, Doctor J decided to give him a codename. Picking one appropriate for the mission, J dubbed the young pilot "Heero Yuy," and sent the boy to Earth to free the colonies as his namesake had once intended.
As the Wing Gundam entered Earth's atmosphere, Heero spotted a civilian shuttle in his path, which carried Vice Foreign Minister Darlian and his foster daughter Relena. While contemplating whether or not to destroy the shuttle, Heero was interrupted by an Alliance patrol squadron, led by OZ's ace pilot Zechs Merquise. Even with Wing's incredible flight capabilities, Zechs managed to grapple the Gundam with his Leo in free-fall and subsequently vacate his machine, sending both mobile suits smashing and sinking to the bottom of the Pacific Ocean.
Washing up on the beach, Heero's unconscious body was found by Relena and, in an attempt to kill himself, pounded his chest detonator triggering the flight suit's built-in suicide bomb. However, the saltwater damaged the explosive which caused only his detonator to fire, knocking Heero over. Nevertheless, the fizzled detonation gave him a momentary distraction to escape from both Relena and the medics arriving shortly thereafter, hijacking the ambulance and driving away with it. Heero later enrolled at Saint Gabriel Institute, as a cover for his activities: coincidentally, Relena was attending the same school. When Relena gave Heero a written invitation to her birthday party, he tore the invitation and threatened to kill her.
Heero later planned to destroy the sunken Wing Gundam, in order to prevent OZ from getting their hands on it. He broke into an Alliance naval base and prepared several torpedoes to destroy his Gundam. However, he was interrupted first by Relena, who had sought him out instead of attending her own party, then by another Gundam pilot. Duo Maxwell had found Wing and planned on keeping it for spare parts. An altercation occurred where Heero ended up taking multiple gunshot wounds, and both Gundams were damaged from Heero's attempt to destroy his. Heero was then taken to an Alliance hospital under guard. Duo managed to break him out, but as they jumped from the tall building, Heero didn't open his parachute, with the intent of committing suicide. Relena, who was present, called out to him; this caused him to finally open the chute, saving his life, but breaking his leg in the process. However, he later managed to set the bone manually, much to Duo's disgust, and was given back Wing. Needing to repair his Gundam, Heero secretly stole parts form Duo's Gundam Deathscythe and he quickly used the repaired Wing for a mission to destroy an enemy carrier transporting Gundanium Alloy.
Later, Vice Foreign Minister Darlian was assassinated by OZ for his continual support of peace between Earth and the colonies. Relena, who was present, was labelled a potential risk and marked for death as well. She was rescued by Doctor J, who told her about Heero and his mission. Returning to Earth in time for a party at the St. Gabriel Institute, Relena confronted Heero and told him that she learned the truth about him from J and that he had no reason to consider her an enemy. Unfortunately, OZ sent a mobile suit team to attack the school with the intent of killing Relena. Heero used the Wing Gundam to drive them off before running away as well, still stunned by the fact that he not only couldn't bring himself to kill the girl, but that he actually saved her from certain death.
In May of A.C. 195, Heero was informed of an OZ meeting at the New Edwards Base in California, although in truth, it was actually an Alliance peace conference aimed at better relations with the Colonies. Proceeding there with Duo as his back-up, the pair ran afoul of two more Gundams and their pilots, Trowa Barton and Quatre Raberba Winner. During the fight, a shuttle bearing OZ markings attempted to flee. Seeing this, Heero flew up to the shuttle in his Gundam and destroyed it. Unfortunately, the whole thing had been a set-up. OZ's leader, Treize Khushrenada, had lent his shuttle to the Alliance's pacifists for their evacuation, including Field Marshal Noventa, who had been urging for peace with the colonies. In reaction, General Septum declared war on the colonies. After hearing the news from the final Gundam pilot Chang Wufei about what really happened, Heero was in shock. Heero became consumed by feelings of guilt and made no attempt to fight back against OZ's Leos, forcing Duo and Quatre to protect him. Heero's mental state returned to normal when he learned from former Alliance Major Sally Po that OZ was planning to detonate all the missiles at the New Edwards Base in order to destroy the Gundams. Heero then entered the missile silo complex and disarmed the missile that was set to trigger all the other missiles to explode.
In June of A.C. 195, Doctor J informed Heero that OZ was transporting its new Taurus model to its base in Siberia and he chose to attack the air route, so did Trowa, while Duo and Quatre attacked the land route, which turned out to be a decoy. During the battle, Heero encountered Zechs, who wanted to test his new Tallgeese suit against the Wing Gundam. In the middle of their duel, however, Lady Une of OZ threatened to use the Alliance's own missile satellites to attack the colonies unless the Gundams surrendered. Doctor J broke into the transmission, offering his surrender but not that of the Gundams. That was Heero's cue; under orders, he activated his Gundam's self-detonation device while standing outside the cockpit, destroying Wing and nearly killing himself.
Trowa recovered him and spent a month nursing him back to health. After recovering from his near-death experience, Heero sought penance for killing the Alliance's pacifists by tracking down their families and offering to let them kill him as payback. During this course, Heero and Trowa were met by Lucrezia Noin, who had an offer from Zechs. The pair travelled to OZ's base in Antarctica, where Zechs had been rebuilding the Wing Gundam in secret. His reason: to get the duel he had been denied by Lady Une's intervention. Heero agreed, but chose to use Trowa's Gundam Heavyarms instead; he felt that using the rebuilt Wing would make him feel beholden to Zechs and affect his fighting. The two dueled, only to be interrupted once again, this time by Relena, who had a letter from Field Marshal Noventa's wife urging the boy not to be so careless with his life. In this confrontation, it was revealed that Zechs was actually Relena's older brother, Milliardo Peacecraft. Trowa then arrived at the controls of Wing, informing Heero and Zechs that OZ's pursuit team was on their way. Zechs offered to cover everyone's escape, shouldering the blame.