The Second Battle of Geonosis, also known as the battle of Geonosis and invasion of Geonosis, took place in 21 BBY during the Clone Wars on the planet Geonosis, which had also served as the site of the conflict's opening battle. The battle began when the Galactic Republic launched a full-scale planetary invasion of Geonosis in an attempt to cease the operation of several battle droid factories constructed by the Geonosian Archduke, Poggle the Lesser. Following a covert mission conducted by Senator Padmé Amidala to the planet Cato Neimoidia, the Republic managed to discover that the Confederacy of Independent Systems had constructed a series of droid factories on Geonosis, which led to the dispatch of a large Jedi-led invasion force from the Grand Army of the Republic to retake the planet and hinder the production of more battle droids.
Upon their arrival, the Jedi, tasked with forming a staging area for their assault, mounted a three-pronged attack on the Separatist forces under the command of Jedi Generals Obi-Wan Kenobi, Ki-Adi-Mundi and Anakin Skywalker, who each led their respective forces to the landing site. Following their establishment of the landing zone, the Republic forces recuperated and managed to breach the deflector shield protecting the droid factories, allowing for additional clone trooper reinforcements to arrive.
The Jedi Council suspected Rush Clovis, Senator for Scipio and the Banking Clan, was conspiring with the Confederacy of Independent Systems. Thus, they asked Senator Padmé Amidala to spy on Clovis, but she refused. However, she accepted the assignment when her secret husband, Anakin Skywalker, convinced her to do this mission after he told her that he may be working with the Confederacy.
Amidala was able to convince Clovis to let her accompany him on a trip to Cato Neimoidia to speak with the Neimoidians. After arriving there, Amidala discovered that Clovis was working with Senator Lott Dod and Archduke Poggle the Lesser in building the biggest droid factory that would give them great profits. Poggle and Dod insisted they should get a greater share of the profits, but Clovis refused. Poggle and Dod then decided to poison Amidala to get Clovis to change the deal. Amidala then stole the hologram disc of the factory before succumbing to the effects of the poison. Skywalker, disguised as her pilot, was able to get the disc and save Amidala when Clovis gave her the antidote. However, Skywalker left him behind without the disc.
Following the Battle near Dorin, the Republic sent Jedi Generals Ki-Adi-Mundi, Obi-Wan Kenobi, Luminara Unduli, and Anakin Skywalker to take Geonosis with a massive invasion. The Jedi Generals then spoke with the Outer Rim Command about their plans for the coming battle. They would attack the shield generator protecting the factory with a three-pronged assault. They hoped to capture Poggle who holed up at the factory. Despite Supreme Chancellor Sheev Palpatine's concerns, Jedi Masters Yoda and Mace Windu gave the go ahead for the attack, beginning what would amount to be a multi–day battle.
As the Acclamator-class transgalactic assault ships made their descent, Kenobi's and Clone Marshal Commander Cody's force boarded their LAAT/i gunships and flew to secure the rendezvous point. Despite the strafing runs performed by the BTL-B Y-wing starfighter/bomber squadron, the gunships came under heavy fire from Geonosian air and ground defenses. Mundi's and Commander Jet's forces then followed. However, Mundi and Jet were forced to land their AT-TEs away from the rendezvous point due to the underestimation of the Geonosian resistance. Simultaneously, Skywalker's, Commander Ahsoka Tano's, and Clone Captain Rex's gunships were shot down and all their AT-TEs were destroyed. Despite that, Skywalker, his team, and the rest of his forces continued towards the rendezvous point. Mundi's gunship was shot down and Mundi was wounded. Commander Cody was able to land his AT-TEs, but the landing area came under fire from the Geonosians and their AATs. Kenobi's gunship was then hit and crash landed away from the landing zone. Only Kenobi and clone trooper Trapper survived the crash, though the two had to be rescued by clone troopers Waxer and Boil after the gunship was spotted by the clones. Kenobi and Trapper were brought to Point Rain, and AT-TE 636 gave covering fire for the group. Kenobi, Cody and their troopers then held the rendezvous awaiting Skywalker's and Mundi's forces.
As Mundi's forces made their way through the Caltrop field to the rendezvous point, Jet contacted Admiral Wullf Yularen for air support. The Admiral however, could not divert any air support with risks to other units. Despite that, Yularen gathered a squadron and put it in reserve. Jet then left a squad with the AT-TEs and went with Mundi and his clone flametroopers to the rendezvous. They went into a cave that Mundi believed would be the quickest way to the rendezvous point. In the cave, they were then attacked by Geonosians, but were able to fight their way to the end the cavern.
Skywalker's forces then made their way to the rendezvous point against the Geonosians and their gun emplacements. Skywalker and his force then came to a fortress that blocked their path. Skywalker and Tano then scaled the wall. They were able to destroy the battle droids, but they were then confronted by droidekas. Skywalker and Tano were able to defeat the droidekas with Rex's help. They then planted explosives inside the wall and the way was cleared. Skywalker's forces were then able to meet up with Mundi's forces. Skywalker then contacted Yularen for air support. Yularen was able to provide a squadron of BTL-B Y-wing starfighter/bombers.
As Kenobi's forces were being overrun, the bombers then took out the Geonosians' forces surrounding the rendezvous point. Skywalker's and Mundi's forces then joined Kenobi's to plan the last part of their attack. Skywalker would attack the outer defenses of the fortress while Kenobi brought in the AT-TEs and Mundi brought the gunships. Skywalker, Tano and a squad were able to penetrate the shield. They then threw droid poppers at the fortress's proton cannons, disabling them. Kenobi then brought the AT-TEs in range of the shield generator and they destroyed it. After the shield went down, Mundi brought in the gunships and captured the remaining Geonosians. Kenobi and Mundi, along with the rest of their wounded, left to recuperate, leaving Skywalker, his apprentice, and their forces to destroy the factory.
To help Skywalker, Tano and their forces in destroying the factory, Unduli, along with her apprentice Barriss Offee and Commander Gree's 41st Elite Corps to assist in the attack. Skywalker originally planned for a frontal assault, but Unduli suggested that they infiltrate the factory using the catacombs under it and blow it from the inside. They agreed, despite Skywalker's concern, that Tano and Offee would carry out the infiltration while Unduli and Skywalker would distract Poggle's forces.
As Tano and Offee made their way through the catacombs, Unduli and Skywalker then marched their troops across the bridge, without cover to get Poggle's forces' attention. During his time there, Poggle and his T-series tactical droid, TX-21, were running the factory at 50% capacity and had ten garrisons of droids ready to be deployed. The super tanks were not finished yet but would be ready. The droids were then deployed, marching across the bridge to fight the clones. As the two forces fought, TX-21 then sent in Geonosians to attack from above. Despite this, Skywalker's and Unduli's forces were able to defeat the droids. However, Poggle, at the urging of TX-21, deployed the super tanks. As they moved in on the clones, Skywalker ordered their artillery cannons to fire at it, to no effect. The super tanks rolled over the clones as they made their way across the bridge.
As the battle raged above, Offee and Tano were able to make their way through the catacombs to the main reactor. Unfortunately, Offee inadvertently woke one of the Geonosians, who informed Poggle and TX-21 of this. After planting the bombs, Offee and Tano were then confronted by Poggle, TX-21, their Geonoisans and a super tank. Tano threw a charge onto the tank that failed to even dent the super tank, but destroyed TX-21 in the blast. Offee and Tano then fought the Geonosians to get their bombs back, but failed. When Tano was knocked out, Offee took the droid drivers and took control of the super tank. Both of them decided to use the tank to destroy the factory.
As the super tanks moved across the bridge, Unduli and Skywalker planted explosives to make the tanks fall into the ravine. They were successful in destroying the tanks. However, they were then confronted by more B1 battle droids. Skywalker then contacted Tano, telling her to set the bombs off. However, they then used the tank, knowing it might kill them. They fired the tank at the reactor, and the factory collapsed, burying them inside the wreckage. Despite that, Skywalker and Unduli were able find their apprentices alive.
After the factory's destruction, the Separatist forces fell. Despite the high casualties to the Republic forces, Jedi Generals Kenobi and Unduli began to clean up the planet of the Separatists. They also launched a search for Poggle to capture him before he could make his escape. Luminara and clone trooper Buzz tracked Poggle to a location known as the Progate Temple. It was believed this was a mistake, as the temple had been severely damaged in the open phases of the Republic's campaign, but once inside they were unexpectedly attacked. Buzz was killed in the fighting and Luminara was then captured. After the sandstorm, Kenobi, Skywalker, and Cody led a force of clones, including Gearshift, to investigate. Heading into the catacombs, they encountered reanimated Geonoisans and eventually encountered the Geonosian queen, Karina the Great. She told Kenobi and Skywalker about her brain worms, which would enable her to control the minds of three Force-sensitives. However, using the clone trooper's lights to blind their enemies, the Republic forces managed to rescue Luminara and capture Poggle. Thanks to a cave-in the clones caused, Karina was killed.
Following the capture of Poggle, he was brought into Republic custody. Some time later, the Archduke was transferred to a prison on Coruscant as a prisoner of war. There, he was repeatably interrogated about a secret superweapon some in the Republic thought the Separatists could be developing.
The Second Battle of Geonosis, was a battle that was featured in the second season of the television series Star Wars: The Clone Wars . It was part of a five-part story arc. Three of the episodes that featured the actual battle were Landing at Point Rain," "Weapons Factory," and "Legacy of Terror," which began airing on November 4, 2009 and concluded on November 20. The three episodes were followed by the conclusion of the arc, "Brain Invaders," and were preceded by the episode "Senate Spy," which led into the battle by detailing the Republic's discovery of the droid foundries.