The End War

The End War (エンドウォー, shimekirieki) was a major universal conflict that involved the Gotei 13, Los Cinco Dios, Eximo Espada, Termino Muerte, and the Ryoka led by Seireitou Kuchiki. It was fought between the Hueco Mundo army led by Termino Muerte and the Shinigami Army led by commanders Byakko Kirisake, Hikaru Kurosaki, and Seireitou Kuchiki

Assult on the Seireitei
After Kouhei was released by Gotei 13, a group of arrancars named Perentorio Vida and Innay Alloh attacked the Seireitei. They demanded the capture of Kouhei Tandokuno, to which Innay had already drawn his sword and dispatched numerious unseated Shinigami.