Corthenia campaign

In 11 BBY, elements of the Imperial Navy launched a campaign in the Corthenia system, which was still controlled by a Separatist splinter state. Armed with Separatist warships, the Corthenian Separatists held off an Imperial fleet for nearly a month before surrendering their sovereignty to the Galactic Empire. A brief ground engagement also took place between the Corthenian Separatist Army and Imperial Navy infantry personnel in Corthenia's capital city of Corthenisi.

A Tycon-class battle station was set up in the system to serve as the Imperial Navy command center in the Corthenia sector, though was shortly after destroyed by Corthenian insurgents armed with disruptor bombs sold to them by the Mandalorian arms dealer Naastau. The Corthenian insurgency continued to actively wage a guerrilla war with the Imperial occupation before joining the Rebel Alliance during the Galactic Civil War. In 4 ABY, the Imperial occupation of Corthenia remained active as a splinter state and formed the Imperial Corthenian State, as a member of the Imperial League, and remained active until Corthenia was invaded by the New Republic in 10 ABY, allowing the insurgents to reform their previous government as the Free Republic of Corthenia.