Shinigami Order

The Shinigami Order was an alliance of Shinigami that fought during the First Shinigami-Hollow War, that preceded the Gotei 13. It was started by Joel Goldsmith's father, and after his death, was led by Burabura Henrekisha Dekasekiroudousha, the master of Joel. After the Shinigami Order was dissolved, Joel got the inspiration to help Shigakuni Genryusai Yamaoto and the others to create the Gotei 13.

Overview
Much of the history behind the Shinigami Order remains unknown. Nobody remains alive today who witnessed it's creation, and very few, including  Joel, who had heard about it otherwise. However, we do know that itw as concieved 50 years before the First Shinigami-Hollow War, in order to combat Hollows. The Soul Society was in a state of consant war and suffering, and the assumpting was an order of powerful Shinigami would finally be able to bring peace. It's for this reason that they became a major component during the First Shinigami-Hollow War. The Shinigami Order was split up very intricately into 50 battalions, spread all throughout the Soul Society, 25 spread in the Rukongai District, and 25 spread in the Seireitei. Each battalion was led by a Commanding General, which is said to have about as much power as a current Gotei 13 Captain.