Massacre of Myomar

The Massacre of Myomar was an atrocity perpetrated by the Imperial Grand Admiral Ishin-Il-Raz. Taking place between 2 BBY and 4 ABY, Il-Raz sought to earn favour from Galactic Emperor Palpatine, choosing to attack the inhabitants of the planet Myomar in the Expansion Region. Commanding the massacre from his Imperial-class Star Destroyer, called the Emperor's Disciple, Il-Raz secured an Imperial victory, and continued to command several battles in the hopes of gaining Palpatine's favour, including the Bombardment of Shalam

Behind the scenes
The Massacre of Myomar was first mentioned in the article Who's Who: Imperial Grand Admirals, written by Daniel Wallace and Abel G. Peña and published in Star Wars Insider 66 in 2003