Jaburo
At last the White Base arrives at Jaburo, the Federation Forces' underground headquarters in South America. Here the Federation has already begun production of mass-produced mobile suits based on the Gundam, and is preparing to launch a counteroffensive against Zeon's home territory in space. The White Base is assigned to take part in this new campaign.

Meanwhile, Char Aznable locates Jaburo's hidden entrances and summons an airborne force from North America to assault the Federation stronghold. The attack fails, and the rebuilt Federation fleet is then launched up into space, with the White Base acting as a decoy to divert the Zeon forces that wait in orbit.

Encounters in Space
The White Base proceeds to the neutral colonies of Side 6, where Amuro meets a mysterious girl named Lalah Sune with whom he feels an instant rapport. The ship then continues on to rendezvous with the Federation space fleet for an attack on Zeon's Solomon space fortress. Solomon commander Dozle Zabi attacks the Federation fleet in a powerful new mobile armor, only to be defeated by Amuro's Gundam.

The Federation Forces occupy Solomon and turn it into a staging area for the next phase of their space offensive. The White Base is sent to patrol the perimeter, and encounters enemy forces at the abandoned Texas colony. Here Sayla confronts her long-lost brother Char, who has sworn to avenge their father, the true founder of the Zeon nation, by wiping out the usurping Zabi family.

Operation Star One
The Federation armada gathers for Operation Star One, an attack on the space fortress A Baoa Qu that guards the Zeon homeland. But the fleet comes under attack from an experimental mobile armor controlled by a powerful Newtype. Its pilot is none other than Lalah, who, despite her psychic bond with Amuro, is prepared to sacrifice her own life for Char's sake.

Meanwhile, the war-weary Sovereign Degwin has decided to make peace with the Federation. But just as Degwin approaches General Revil's fleet, his scheming son Gihren targets them both with Zeon's ultimate weapon, a huge laser cannon called the Solar Ray. In the wake of this disaster, the White Base and the other remnants of the Federation fleet regroup for a desperate assault on A Baoa Qu. Here the surviving members of the Zabi family will make their final stand, and here Amuro and Char will face each other in battle one more time...