The Battle of Cato Neimoidia, also known as the capture of Cato Neimoidia, was one of the final battles of the Clone Wars, in which Jedi General Plo Koon led the Grand Army of the Republic‘s 442nd Siege Battalion against the Confederacy of Independent Systems for control of the Neimoidian Purse World of Cato Neimoidia, headquarters of the Trade Federation. The Galactic Republic captured the planet in the final hours of the conflict. While conducting a post-battle patrol flight over a bridge city, Koon was killed by his clone wingmen when Supreme Chancellor Sheev Palpatine enacted Order 66.
During the final year of the Clone Wars, the Neimoidian Purse World of Cato Neimoidia, homeworld of Separatist Council member Nute Gunray and headquarters of the Trade Federation, was invaded by the Confederacy of Independent Systems. Though Jedi GeneralAnakin Skywalker and CommanderAhsoka Tano led the Grand Army of the Republic‘s 501st Legion into battle against the Separatist, they were recalled to Coruscant after the Jedi Temple was bombed, allowing the battle to end in a Confederate victory. Having captured the planet, Cato Neimoidia fell under Separatist control.
During the Outer Rim Sieges in the final days of the Clone Wars, the capitulation of Cato Neimoidia was identified as a prime strategic goal that would help to end the conflict. The Jedi Council dispatched Jedi MasterPlo Koon to Cato Neimoidia to lead the 442nd Siege Battalion, proficient in besieging enemy fortifications, against the Trade Federation stronghold. At one point, CC-2237 “Odd Ball” flew alongside Koon on Cato Neimoidia. Around the time of the Battle of Yerbana, Koon led starfighters against a trio of Separatist Providence-class Dreadnoughts and droid tri-fighters. Additionally, Clone Flight Squad Seven participated in the battle. The Republic eventually captured Cato Neimoidia in the final hours of the Clone Wars.