Before they can come to blows, Mikazuki intervenes the rebuilt Gundam Barbatos Lupus Rex and battles the Gundam Vidar, but Gaelio reveals that his Gundam uses a pseudo Alaya Vijnana System based on Ein Dalton's brain. Unfortunately, the equipment is revealed to be sabotaged by Gjallarhorn and the battle becomes a one sided slaughter while Gjallarhorn invokes a media blackout. While they succeed in stopping the invasion force, Carta tries to kill Orga, whom she realizes is leading Tekkadan. The conflict exposed the corruption of Gjallarhorn as well, and the world was changing slowly but surely. Sunrise announced that the series will be streamed worldwide on via the Gundam. This leads to a standoff between Tekkadan and the Outer Earth Orbit Regulatory Joint fleet which has descended to the surface. This is a subversion of the usual state of affairs in a Gundam series, where a hit with a beam weapon on a non-main character machine is usually devastating.
However, there are many who do not look favorably about the rise of the youngsters who are trying to start something new. The two quickly shoot each other, but Gaelio's mask protects him while McGillis is fatally shot in the chest, with Gaelio pinning the dying McGillis to a wall and demanding acknowledgment as the victor. Crunchyroll, Funimation, and Hulu also aired the anime with a 1 week delay. Naze and Amida provide cover for their comrades to evacuate, but Iok orders his Dáinsleif squadron to open fire at the transport ships. After revealing himself under the mask, McGillis tells Orga and his team his plans to reform the corrupt Gjallarhorn. As the series comes to a close, Kudelia silently monologues that while Mikazuki and Tekkadan are gone, she could still love the world that they sacrificed their lives to change.
While a temporary peace had arrived, the seeds of a new conflict were being sown in the Mars Sphere, far away from Earth. Meanwhile, Kudelia offers to remedy the illiteracy of Mikazuki and the younger crew members by teaching them to read and write. With no one left to trust, Tekkadan sever their ties with the Admoss Company to take part in the revolution led by McGillis. Rustal instigates a maneuver using a hijacked revolutionary fleet Graze and firing a Dáinsleif toward his own fleet to justify a massive counterattack with the railguns, which leaves a majority of the revolutionaries' fleet destroyed or crippled. Kudelia and Teiwaz form the Admoss Company to mine, process, and ship the half-metal of Arbrau colonies. As a reward for their success, McMurdo Barriston gifts Tekkadan with Chryse's largest half-metal mine, where Tekkadan later discovers a Gundam Frame and another object larger than a mobile suit. In the aftermath several years later, Gjallarhorn repeals its council system and starts a more democratic organization, with Rustal as its head.
The remaining Human Debris from Brewers are taken by Tekkadan with assurances they will be taken care of on Mars. To Orga's horror, Rustal refuses because he wishes Tekkadan to be made a scapegoat and slaughtered by the Arianrhod fleet, in order to restore both faith in Gjallarhorn and peace in the Earth sphere. It also shows the abilities of the different mobile suits. A second Promotional video was then revealed, confirming the voice actors for the series's main cast. Crank reluctantly complies but has qualms over killing child soldiers.
McGillis tells him to stop the excavation immediately, revealing what they discovered is an ancient Mobile Armor; a forbidden piece of technology that caused both the Calamity War and the mass casualties associated with the conflict. Merribit and Dexter manage to secure funds from one of Tekkadan's accounts to keep the organization afloat - but just before they can call Makanai, the base is surrounded by Gjallarhorn. While largely forgotten, Tekkadan's surviving members live on with new identities in the Admoss Company, Sakura's orphanage, the Martian Union and the Kassapa Mobile Worker Factory, with all of them remaining in touch. Force through the first Blu-ray volume serial code. Conflicted, Gaelio breaks down as McGillis succumbs to his wounds, bidding his deceased friend farewell. Orga ponders retreating, but his men convince him to see this battle to the end and he orders the Isaribi to charge through Arianrhod's main fleet. Some years later, Tekkadan establishes itself as a prominent military company, while Kudelia establishes a mining company in Chryse, working to improve the inhabitants' conditions and McGillis moves forward with his agenda to reform Gjallarhorn.
McGillis prepares to board the Gundam Bael - the first Gundam ever built, rumored to contain the soul of Gjallarhorn founder Agnika Kaieru - but he is suddenly confronted by Vidar, who unmasks himself as Gaelio Bauduin. Aston sacrifices himself to save Takaki and trap McGillis before Mikazuki arrives and intervenes in the melee, forcing Galan and his troops to retreat. Just as Tekkadan are about to get their hands on Sandoval, Gjallarhorn's Arianrhod fleet arrives and interferes with the mission, revealing that Isurugi and Arianrhod are under two separate and competing chains of command. Just as Orga, Chad, and Ride head back to base, they are ambushed by men in suits sent by Nobliss and Orga dies from his wounds. She also opens an orphanage at the Sakura Farm on Mars. As Tekkadan's Mobile Suit squadron mows down the enemy units, Jasley contacts McMurdo to ask for help, but McMurdo reveals Jasley's plan to have him arrested by Gjallarhorn so he will take over Teiwaz. In Tekkadan's first job, they accept to escort Kudelia to Earth for her to take part in the negotiations with the government of Arbrau, the superpower that rules over Chryse.
However, one of Gjallarhorn's factions opposing him, the Arianrhod Fleet, led by Rustal Elion, starts working in the shadows to sabotage both McGillis and Tekkadan, leading both to join forces against them, with McGillis promising that once he manages to take full control of Gjallarhorn, he will transfer all authority over Mars to Tekkadan, making them the de facto rulers of the planet. In Mobile Suit Gundam Extreme Vs. Despite disarming his Reginlaze, Iok charges toward the Gundam Bael, but McGillis quickly downs him, prompting Gjallarhorn to launch a counterattack. Upon receiving word that his elder brother Savarin has committed suicide for his actions that resulted in a Dort 3 massacre, Biscuit contemplates on leaving Tekkadan. As a show of trust, Orga gives McMurdo his sakazuki cup to break, should Tekkadan be considered a hindrance to Teiwaz. Kudelia addresses the assembly and chastises them for their treatment of people.
To make matters worse, all transportation, diplomatic, and military access into Arbrau have been blocked by control of Galan and Radiche, making negotiations or entry for either Tekkadan or McGillis impossible. Upon being asked if what they are doing is on Orga's orders, Takaki hesitates but then recklessly attacks McGillis, only to get outmatched by the Graze Ritter. While McMurdo declines to break the cup due to his investments on Mars, he warns Orga that any betrayal of Teiwaz would lead to severe consequences for Tekkadan. Frustrated and disparaging, Shino charges forward in a run toward the enemy fleet, before his mobile suit is pulverized from return fire. Orga and Mikazuki visit Gyojan and demand compensation for Tekkadan's losses against the Dawn Horizon Corps, with Mikazuki executing him for being unable to pay reparations, while the rest of Terra Liberionis is later apprehended by Gjallarhorn. There, the leader of Tekkadan, Orga Itsuka, senses an attack from a new enemy.