Nightbrother Revolution

The Nightbrother Revolution was an event occuring on Dathomir as a result of the last Seventh Sister attempting to train a new order of Nightsisters during a memorable adventure with Luke Skywalker, who defeated the Inquisitor.

History
"That was the old head. Skywalker killed him during the Nightbrother Revolution on Dathomir so Solo's old girlfriend could become its head."

- Reveth

Following the Battle of Endor and the Galactic Concordance, Luke Skywalker encountered numerous Imperials dabbling in Force sensitivity. Among these was a Seventh Sister, the last of several Inquisitors to take that title, with whom Luke had a memorable adventure. She attempted to train a new order of Nightsister Witches of Dathomir, but her efforts ultimately triggered the Nightbrother Revolution. According to rumor, Skywalker killed a Nightbrother head of Crimson Dawn during the Revolution, in order that Han Solo's former girlfriend could take his place. Luke defeated the Seventh Sister, and ultimately put down the revolution.

Aftermath
Afterwards, Skywalker tested out the strongest of the Witches as potential candidates to join his new generation of Jedi.

During his exile on Ahch-To in later years, Skywalker thought back on his memorable adventure with the Seventh Sister that led to the Nightbrother Revolution. The pirate Reveth spoke about the Revolution while commemorating the death of Han Solo, suggesting that Skywalker had killed a Nightbrother head of Crimson Dawn in order for Solo's old girlfriend to take control of the cartel, having heard the rumor from a Cloud-Rider girlfriend of Solo's on Aduba-3.