Castigation of Suzanoh

The Castigation of Suzanoh was an Imperial xenocidal purgation campaign that was a part of the larger Indomitus Crusade, conducted by the Exalted Seraphs Space Marine Chapter alongside local Astra Militarum Regiments and PDF against the encroaching Tau Empire upon the Imperial world of Suzanoh.

History
During a rebellion of a fortress world named Suzanoh, near the Eastern Fringes, wanted to join the Tau Empire during the appearance of the Great Rift. The 4th and the 6th Companies joined the loyalist Astra Militarum regiments to defend a stronghold until reinforcements could arrive. But the insular and haughty Exalted Seraphs treated the Astra Militarum troops as lowly peasants and they instead focused their efforts on killing the traitors and the Tau, rather than defending the stronghold. The Imperial Guardsmen were killed by the Tau and the rebels, and when the Tau fleet arrived, the 4th and the 6th Companies escaped the lost world and falsely reported to Imperial command that the guardsmen were incompetent and lazy in the performance of their duties and had failed to properly defend the stronghold, instead of accepting the blame for the role they played.