After colony 196, one year after the war of earth and the space colonies, a new United earth nation is formed and all weapons of war were destroyed. The Gundams were to be destroyed also but the leader of Colony L3 x18999 ( Trowa's home colony ) under Marimela Barton ( eventualy is Kruzeneida, the daughter of Treize) declared independence and War on the United Earth Nation. Kidnapping Relena Darlian, Marimela under the guidance of Dekim Barton Plans to drop the space colony on earth, and to take over the world using a new type of mobile suit, the Serpent Unit. This plan was discovered by the Preventers who at that time is the only protectors of peace, knowing they cannot do much on their own Zech's came back to become a preventer and help to save the world. Together with Gundam Pilots Heero, Duo, Quatre, Trowa and Taurus Pilot Noin, they tried to stop Marimela in Brussels. But the number and fire power of the new mobile suit is enough to hold Gundam Death Scythe hell, Heavy arms, Sandrock, Tallgeese III and taurus since their objective to demobilze the serpent units without killing the pilots. Heero and Wufei is doing battle in space all the way down to earth, Wufei was currently on Marimela and Dekims side but later on he realizes the wrong he has done and eventually take sides with the other four pilots. At the Climax of the Story Wing Zero exploded After firing 3 shots with its buster riffle on Brussels palace underground, Marimela realized the mistakes she had done for she was mislead By Dekim and his ambition, the remaining four gundams were blown up by their pilots and lived a peaceful life. After Colony 197 one year after the conflict the conflict that started on L3 colony, peace was restored once again. No more weapons like mobile suits including the Gundams ever appeared