The Battle of Ossus, also known as the Massacre on Ossus, took place in 40 ABY during the Second Galactic Civil War. The battle was between the Jedi of the academy and Galactic Alliance Guard (GAG) Troopers sent by Jacen Solo to threaten the New Jedi Order. The battle ended in the Jedi capturing the GAG troopers, with Kam Solusar and Tionne Solusar being badly injured.