In the year 3 ABY, the Abridon Nationalists made an attempt to expel the Galactic Empire from the world of Abridon.
The Nationalists launched their uprising against the Empire around the time of the Battle of Hoth. They successfully reached out to the Rebel Alliance, who in turn offered substantial military assistance led by General Tyr Taskeen.
Having gained control of at least the capital and the adjacent rural areas, the Nationalists and Rebels started discussions. A group of five Rebel diplomats, including Luke Skywalker, began negotiating with the Abridon Government Council regarding Abridon joining the Alliance.
These discussions were cut short three days following the battle, when Imperial forces, spearheaded by the Imperial-class Star Destroyer named Inquisitor, entered the system to reclaim Abridon, triggering the Massacre on Abridon.