The Battle of Muunilinst was a major engagement that took place within four weeks after the Battle of Geonosis in 22 BBY, initiated by the Republic to put a curb on CIS funding and battle droid production. Storming the planet, the Republic assaulted the main city of Harnaidan, using a team of Advanced Recon Commandos to eliminate key enemy defenses within the city. Meanwhile, Anakin Skywalker led the space assault, taking out various separatist orbital stations.
This was the first battle Durge was seen in, and caused major Republic casualties when he appeared. The IG lancer droids also made their first appearance, jousting with the similar clone lancer troopers of the Lancer Battalion. Despite heavy Separatist resistance, the Republic nonetheless succeeded in capturing the Separatist command, with the efforts of The Muunilinst 10 and other contributing to this. The battle would also signify the Jedi's first encounter with the minion of Dooku's known as Asajj Ventress.