The relatively small conflict known as the Battle of Czerka 431 took place in the era of the Jedi Civil War.
After the Czerka Corporation formed an alliance with the Sith Empire, the Sith assumed complete command of the clandestine research installation, Czerka 431. At that location, they compelled the scientist Joni Ree to conduct experiments involving Juggernaut war droids. Because she was unhappy with her new masters, she reached out to the Galactic Republic, providing them with the coordinates of the research site. She obtained information from them regarding the planned timing of their assault, enabling her to synchronize her own escape attempt. Knowing that the Sith would likely attempt to incapacitate her during her escape, Ree also engineered a mechanism to revive herself from a stun attack.
A squad of six Republic soldiers was dispatched, and Ree successfully managed to escape, aided by two Juggernaut droids, which the Sith did not expect. The Sith soldiers reacted by attempting to eliminate all Republic forces and capture Ree without killing her. Nevertheless, Ree successfully fled and began working in service of the Republic.