The Battle of Nar Shaddaa, also known as the Mission to Nar Shaddaa, was a top-secret operation undertook by the Sith Lord Darth Krayt and the then-Sith Apprentice Darth Nihl.
The objective of the mission was to retrieve the records of the late Darth Abeonis regarding the whereabouts of the starship, The Soiyo. Once upon the planet's surface the three Sith found themselves under the watch on one Darth Q'Antiqas.
After several hours of slaughter Q'Antiqas suggested a deal. He would supply Krayt with the information he required on the condition that Q'Antiqas could join him. Krayt agreed and the entire planet and its garrison declared its allegiance to Darth Krayt.