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]

Over three hundred years have passed since the Calamity War, the great conflict between Earth and its outer space colonies. Now Earth is ruled over by four economic blocs, and the military organization Gjallarhorn is responsible for keeping the peace. Mars, on the other hand, depends heavily on Earth's economy. Horrified by the appalling living conditions that Mars' inhabitants have to bear, Kudelia Aina Bernstein, a young aristocrat from the Chryse Autonomous Region, gets involved in the Red Planet's independence movement. She hires the services of a local company, Chryse Guard Security (CGS), to escort her on the journey to Earth to negotiate economic conditions with the earthly bloc that controls the region. The Third Army Division—consisting of Mikazuki Augus, Orga Itsuka, and many other child soldiers—are chosen to protect her. When Gjallarhorn attacks the CGS facilities to assassinate the young revolutionary threatening their interests, Orga and his comrades must not let the attackers accomplish their goal—in fact, Gjallarhorn's actions might turn out to be the unintentional catalyst that leads the children to be the forgers of their own destiny. [Written by MAL Rewrite]

Tekkadan has now become a direct affiliate of Teiwaz after procuring a new trade agreement with Arbrau. With its newfound funds and prestige, Tekkadan finds both its list of allies and enemies growing. Meanwhile, the flames of the Gjallarhorn power struggle continue to rage in full force. As a part of her efforts to make Mars financially independent from Earth, Kudelia Aina Bernstein founds the Admoss Company and enlists Tekkadan as her business partner. The stakes are getting higher as the Tekkadan family continues to grow. Will Orga, Mikazuki, and the rest of the Tekkadan faction be able to keep up, or will Kudelia's dream of Martian independence die out? [Written by MAL Rewrite]

What was the tragedy that decided the fates of Char Aznable, the man later nicknamed the "Red Comet" as an ace pilot of the Zeon forces, and his sister Sayla Mass? The two siblings' journeys, brought on by the sudden death of their father Zeon Zum Deikun who was a leader of the Spacenoids, are depicted in the four episodes of "Chronicle of Char and Sayla." The Zabi family who seize control of Side 3 and lead the Principality of Zeon, the early days of many renowned Zeon ace pilots who later fight in the One Year War, the secrets of mobile suit development, conflicts with the Earth Federation Forces, and the road leading to the outbreak of war—all will be revealed. (Source: Official Website) Note: A re-edited TV version of the six OVAs released from 2015 through 2018.