Sansor Crusade

The Sansor Crusade was a joint-Imperial xenocidal purgation campaign carried out by the Penitent Knights and Rebutors Space Marine Chapters, alongside order of the Adepta Sororitas and regiments of the Astra Militarum, against an invading Ork WAAAGH! that was assailing the Imperial worlds of the forgotten Sansor System.

Background
Greenskins are arguably the most constant threat to the worlds of Asteria, with warbands of Orks raising on the back-water planets all of the time but can be and usually are quelled by the valiant Imperial Guard. But sometimes, such monsters among the xenos arise and cannot be dealt with by the Militarum, such was the situation with a great WAAAGH! unleashed from the forgotten Sansor System, home to five planets rife with green hordes. The Penitent Knights' Orders of the Dawn and Iron Lance arrived in the system and were met with fellow Astartes; vessels from the Rebutors Chapter had also come of their own accord, being on their so-called "Crusade of the Ages."

The two Chapters then communicated back and forth, agreeing to combine forces to bring about a swift end to the war of besieging Ork-infested planets. Indeed, the Rebutors and Knights seemed to fight beside one another with great efficiency and comradeship and Sansor was slowly but surely crushed by the might of the Emperor's finest. During the climactic battle on Sansor III, the entire combined force of Rebutors and Knights created a deathly ambush in the jungles for the WAAAGH!'s Warboss and his green tide, where hours and hours of bloody battle was done, and the Space Marines lifted the Warboss' severed head high and his underlings ran back to their holes, to be destroyed by orbital fire. Before the Penitent Knights bade farewell to the Rebutors, they gifted to the sons of Dorn a Power Maul, with an inscription bearing the words "Retribution be Swift" upon its haft.