Sandstorm Crusade

The Sandstorm Crusade is the first recorded campaign in the history of the Guardians of Osiris Space Marine Chapter to reconquer their home sub-sector - the Osiris Sub-Sector. Conquering nearly fifty worlds, in 679.M37 they were attacked by the Orks of WAAAGH! Korak upon the worlds of Calamaris III. During the conflict, their first Chapter Master was tragically killed, but his death was avenged by the Chapter's First Captain, who succeeded him as the next Chapter Master.

History
The Guardians of Osiris, commanded by their first Chapter Master, Korv Armanas, declared a crusade on their sub-sector to conquer as many planets as he could to create what they called, the Osiris Realm. When the crusade started, they conquered around 50 worlds. But in 679.M37, the Guardians of Osiris were attacked by a massive WAAAGH! on the world of Calamaris III, were they face their Warboss, Korak, the Jawless Dreadnought. Korv Armanas, went personally on the world with his entire 1st Company and Ivar Ishori, Captain of the First Company. In the battle for the planet Korak face Armanas in a hand to hand combat, and with a powerful strike of his powerful claw, murder the Chapter Master. But Korak, distracted by celebrating his kill, was decapitated by the First Captain's power sword. In the end the WAAAGH! was exterminated, the body of Korv Armanas was brought to Osiris for a funeral, and Ivar Ishori became the new Chapter Master of the Guardians of Osiris.