The Kamino uprising was a conflict in 12 BBY on the aquatic planet Kamino, the origin world of the Grand Army of the Republic during the waning days of the Old Republic. After having spent the better part of the last couple decades growing clone troopers for the Old Republic and stormtroopers for the Galactic Empire under Emperor Palpatine, a group of Kaminoans went rogue, using their cloning resources to grow an army with the intent of combating Palpatine’s New Order. The Kaminoan resistance once again used the Grand Army of the Republic’s template, Jango Fett’s DNA and equipped their soldiers with phase I clone trooper armor.
Upon learning of the insurrection, the Galactic Empire hired renowned bounty hunter Boba Fett, himself a clone of Jango Fett, to penetrate and sabotage the cloning facilities of Tipoca City. Fett’s childhood spent in the city granted him intricate knowledge of the facility’s layout, and he led the Imperial Army to a crushing defeat of the “anti-clone” army. The Kaminoan leadership themselves were destroyed when their escape transports were shot down as they attempted to flee. Before the battle’s end, Fett extracted a sample of the Jango Fett DNA and delivered it to his Imperial clients. The uprising led to a restructuring of the Imperial cloning policy; the previous model of centralized cloning sources was abandoned in favor of having a wide variety of cloning centers and genetic templates.