The Second Battle of Ossus was the most devastating battle in terms of casualties in the entire Xibalba Crisis. Following the Bastion Incident the Jedi found out that the Order of Xibalba along with it's allies are preparing to attack the Jedi Academy at Ossus. Fearing for the population of Ossus Cade Skywalker ordered an immediate evacuation of the planet though the Jedi refused to leave the planet Master Nero then sent a request for the Galactic Alliance to send a relief force to their aid and that Cid and Hanaka will be waiting for their arrival.