In Universal Century 0088, the Anti-Earth Union Group (AEUG) has emerged victorious in its war with the Earth Federation's Titans at the cost of devastating losses. Neo-Zeon, the third faction in the war formerly known as Axis Zeon, remains as powerful as ever. Led by Newtype Haman Karn, Neo-Zeon has been implementing plans to take over both Earth and the space colonies. The AEUG flagship Argama heads to the Side 1 colony Shangri-La for repairs. Living in the colony is Judau Ashta, a 14-year-old junk dealer who is struggling to make enough money to put his younger sister through school. Upon the discovery of an escape pod containing a former Titans pilot, Judau and his friends are quickly led to the Argama in hopes of stealing a mobile suit which they can sell for a fortune. However, with the arrival of a Neo-Zeon ship seeking to defeat the Argama, Judau and his friends are dragged into to a conflict that will bring them across space and Earth. [Written by MAL Rewrite]

It is the Correct Century, two millennia after a devastating conflict which left the world broken. Earth is now mostly uninhabitable, and thus a remnant of humanity has resided on the Moon while the Earth and its few survivors recover. For years, the "Moonrace," the people of the Moon, have continued to check if Earth is fit for resettlement. A boy named Rolan Cehack and two others are sent down to Earth for a reconnaissance mission. Rolan ends up spending a year on the planet working for the Heim Family, aristocrats living in a Victorian-like society. This family, like others of similar wealthy status, celebrates one's coming of age with a ceremony involving a giant stone statue known as the "White Doll." To Rolan's surprise, the Moonrace suddenly touches down on Earth with the intent of taking it by force. During the attack, the White Doll is broken apart, revealing a mobile suit called the "Turn A Gundam" inside. With Rolan in its cockpit, the Turn A causes a standoff between the forces of Earth and Moon. The young pilot, along with the people of both sides, must keep the peace and avoid another all-out, catastrophic war. [Written by MAL Rewrite]

When one space colony declared its independence from the Earth Federation, the devastating 7th Space War, an all-out war between Earth and space, resulted. The Federation responded to the Space Revolutionary Army with mobile suits, called Gundams. However, the Space Revolutionary forces played their trump card and dropped hundreds of space colonies onto the Earth, plunging the planet into a seven-year-long nuclear winter. The Federation collapsed, but the Space Revolutionary Army was unable to invade the Earth in the aftermath of the colony drop. Fifteen years have passed. The year is now After War 0015, and a New Federation has sprung up on Earth to restore order. In space, the colonial leaders have been rebuilding their own forces as well. By chance, fifteen-year-old Garrod Ran has discovered an old Federation mobile suit, the Gundam X, and now he uses it to help out the Vulture ship Freeden in its struggle to keep the powers that be from repeating the mistakes of the past.

Meek salaryman Johnson discovers that he is in fact the notorious (and reportedly dead) space pirate Cobra, with a new face and altered memories. Embedded in his left arm is Cobra's unique Psychogun, a famous weapon powered by his own will. Having recovered his past, his partner-in-crime Armaroid Lady, and his spaceship, he journeys across the galaxy seeking adventure. On his travels he will hunt for the galaxy's ultimate weapon, rob museums, break into and out of maximum-security prison, infiltrate a drug ring in the brutal and deadly sport of Rugball, engineer a coup on an alien world, confront the Pirate Guild's most fearsome leaders, and do much else besides—smoking cigars, chasing women and cracking jokes all the while. This, the 1982–83 Cobra TV anime, adapts the Cobra manga from the beginning, covering the first three major stories and building to a grand conclusion with some shorter one-off tales interspersed along the way. (The 1982 Cobra film has only a loose connection to the TV series—though it involved the same director and some of the same animators.)