Rift Alliance campaign

The mission to support the Rift Alliance was undertaken in 3642 BBY as an initiative that the Galactic Republic and Jedi Order prioritized in order to ensure the former remained stable as war ensued at the same time. Supreme Chancellor Dorian Janarus understood that the Rift Alliance was essential to keep the Republic secure and that their potential secession could cripple it. The Jedi Master known as the Barsen'thor was tasked to serve as a liaison to the Rift Alliance and assist them in the endeavors to ensure the Alliance knew the Republic valued them and was committed to them.

The Barsen'thor saved their leaders above Deralia after the Sith Empire decided to strike at them and the Sith were able to continue to observe their efforts over time. The Barsen'thor aided the Alliance on Balmorra where he helped to liberate the planet and on Hoth to defeat the White Maw pirates. These missions saw the Alliance commit themselves to the Republic and it was revealed after this that one member was in fact a mole that worked for the Empire; this revelation sparked a hunt for a little-known opponent that operated in the shadows.

Text and facts from the “Rift Alliance campaign” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.