The Benedictine War was a War of Faith of the Imperium during the Age of Redemption. The operation targeted the Benedictine sub-sector and led by the Black Templars and five Orders of the Sisters of Battle, though it included many other armies of Faith.
During the campaign, several Eldar worlds were captured and in the ensuing conflict two Black Templar High Marshals were slain in succession. Due to this, the Ecclesiarch himself declared an end to the war, claiming that they had achieved enough in the Emperor's name. However, the new High Marshal, Constantine, continued the campaign regardless and the Black Templars alone successfully purged the remaining worlds of Xenos.