Jaburo is the headquarters of the Earth Federation Forces during the One Year War and the years after. It is a massive underground complex in the heart of the South American Amazon River basin. Because of its subterranean location, Jaburo is impervious to conventional assault. Jaburo's exact location is also a strict Earth Federation secret. Jaburo's cavernous reaches holds a megacity itself, along with housing factories, spaceships docks, and many other types of facilities. The Federations early Mobile Suit factories are located in Jaburo, which during One Year War produced hundreds upon hundreds if not thousands of mobile suits, including several Gundams.
Jaburo had often been a target for the Zeon Military; however due to its unusual location, a frontal assault proved difficult. In the early weeks of the One Year War Zeon began Operation British, attempting a space colony drop on the South American rainforest in an attempt to destroy Jaburo. The attempt failed as the colony broke up over the Pacific Ocean and landed in Australia. After the failure of Operation British the Zeon realized the only way to take out Jaburo, was a frontal assault. Prior to Char Aznable's preemptive strike, the Zeon had been working on an attack strategy, using multiple battalions of Mobile Suits and a super powerful Mobile Armor being designed in East Asia by Zeon scientist Ginias Saharin. However, before these plans could be implemented, the war was turning in Federation favor, and the Mobile Armor project suffered major setbacks, such as the creator going insane and killing the Apsalus Project team and taking the Mobile Armor for himself as seen in Mobile Suit Gundam: The 08th MS Team. The other major flaw of the strategy, was the fact that the Zeon ground forces could not confirm Jaburo's exact location.
A stealth attack, however was led by Char Aznable and his forces on November 30, U.C. 0079, after he had traced the White Base to Jaburo. The assault proved devastating for the Zeon forces, who had little time to prepare, and no reinforcements. The Battle of Jaburo was extremely one sided as the Federation had just rolled out several new Gundams including the infamous RX-78-6 Mudrock Gundam, along with several battalions of RGM-79 GMs. The White Base and its famous RX-78-2 Gundam were also present and fought a major battle with Char Aznable, which resulted in Char Aznable retreating and Zeon losing the battle. The Zeon ground attack force was composed mostly of Zakus, Goufs, and Doms. The Zeonic Naval forces included Z'Goks, Goggs, and a Zock and was led by Char Aznable.