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In the year 2199, Earth is a mere shell of its former glory after a vicious bombardment by the Gamilas Empire. The inhabitants have been forced underground to escape the irradiated surface, but the deadly radiation inches closer and closer to the retreating population. With only one year before complete and utter extermination, time is fast running out and hope is in short supply. So far, any attempt to escape or retaliate has been instantly annihilated by the alien empire—until an emergency transmission from the planet Iscandar in a neighboring galaxy offers a glimmer of hope to save the doomed planet. Covertly, Earth's Self Defense Force constructs a faster than light engine for a journey to Iscandar. Armed with new weapons and a determined crew of fearless navy men, the World War II era battleship Yamato is reborn as Space Battleship Yamato. She and her crew set out on a perilous journey across the stars to save their home and the entire human race. [Written by MAL Rewrite]

A year has passed since the Star Force returned to save the Earth but another danger now approaches from deep space. A gigantic White Comet hurtles toward our galaxy, obliterating everything in its path. But it is no ordinary comet—it is the deadly Comet Empire, conqueror of worlds... and Earth is the next target! Against orders, the Star Force blasts off to investigate, but even if they can get past the flagship Andromeda, they don't yet know the true nature of their new enemy! (Source: AniDB)

A stray missile from a confrontation between the Galman empire and the Bolar Federation crashes into the sun, turning it into a time bomb of radiation. The Star Force once again sets off into space, this time on a quest to look for a new world for the human race. (Source: ANN)

Three years since the return of the legendary Space Battleship Yamato, Earth has begun rebuilding itself and has made peace with the Gamilans. However, this recovery comes at the cost of utilizing the forbidden Wave Motion technology. Meanwhile, the notorious former crew members of the Yamato, who have each gone their separate ways, receive a psychic message from the mysterious Goddess Teresa. She urges them to return to their beloved ship and travel to the distant planet Terezart. They are promised a revolutionary power to combat the unprecedented threat of the relentless Gatlantis Empire, who are approaching Earth with all but innocent intentions. Unable to resist her plea, the crew reassembles and sets sail on another perilous intergalactic voyage, one that will test their sheer courage and versatility in the face of an even greater foe.

In the year 2199, Earth faces its greatest crisis. Due to unrelenting bombings by the alien race known as "Gamilas," the planet can no longer sustain its inhabitants. In exactly one year, humanity is set to become extinct. In desperation, the people of Earth establish the Earth Defense Force, their last defense against the power-hungry Gamilas Empire. However, humanity finds a glimmer of hope after receiving a message from the mysterious planet Iscandar, which offers them a device that would restore Earth to its former glory. With salvation in sight, the Earth Defense Force calls on the prolific Space Battleship Yamato and swiftly assembles a crew to make the 168,000 light-year trek to Iscandar and receive their aid. Among the crew are young officers Susumu Kodai and Daisuke Shima, along with several other newly promoted leaders, all under the command of the distinguished Captain Juuzou Okita. Forced to learn how to handle the ship's innovative technology while dealing with the onslaught of Gamilas fleets, the inexperienced cast of Uchuu Senkan Yamato 2199 must summon every inch of their resolve to survive the many hardships aboard the Yamato and complete their mission: to save humanity before it's too late. [Written by MAL Rewrite]