White Base investigates the presence of a Zeon ship at the long-abandoned Side 5 colony, Texas.
The ship in question belongs to the 300th Autonomous Squadron. When Char is informed that an enemy vessel has arrived at the other end of the colony, he deploys in his Gelgoog for the first time, to delay the Federation forces as his Zanzibar prepares to launch.
Meanwhile, Amuro enters Texas in the Gundam, and begins setting off traps left by the Zeon forces, making him easy for Char to spot. They duel until severe damage to the colony separates them.
White Base lands inside the colony, sending out search parties looking for the Amuro. Sayla crosses paths with her brother Char, and they discuss their shared past, which Bright overhears on Sayla's communications channel. Char and Sayla part ways, and by the time the Gundam returns to White Base, the Zanzibar has escaped.
(Mobile Suit Gundam 3: Encounters in Space)