"The Final Victor" is the forty-ninth and final episode of Mobile Suit Gundam Wing. It originally aired in Japan on March 29, 1996 and in North America on May 11, 2000.
Plot[]
Heero and Zechs begin their final duel against one another. Duo sets off with the Gundam engineers, who intend to rewire Libra so it will change its trajectory before it can drop onto Earth. This objective is eventually accomplished, though it kills the engineers along with Quinze. Lady Une announces the surrender of the World Nation to the moderate colony leaders in lieu of Treize's death, who agree with her proposal that the war must end. After Heero ultimately wins the duel, Zechs apparently sacrifices himself to destroy Libra. As a remaining fragment of the station enters Earth's atmosphere, Heero uses Wing Zero's twin buster rifle to destroy it. Following the end of the war, Earth and the colonies unite together to form the Earth Sphere Unified Nation, and Relena becomes the new vice foreign minister in hopes of maintaining the peace.