Quincy Blood War

The Quincy Blood War (クインシー血液戦争, Kuinshī Ketsueki Sensō) is a long-standing conflict that was fought between the Gotei 13 and the Quincy Tribe. Despite having ended with the Shinigami's victory, the continuation of this conflict began a thousand years later following the defeat of rogue ex-Captain Sōsuke Aizen; a war which would be aptly named the Thousand-Year Blood War.