Reclamation of Atargatis

The Reclamation of Atargatis, also known as the Atargatis Crusade, was a conflict fought across the entirety of Subsector Atargatis, home to the jungle of Atargatis II, of the Aetherian Warriors of the . Following the departure of almost the entirety of the Chapter to different warzones and, later, the opening of the in 999.M41, the subsector and much of the Cordoine Sector as a whole fell under attack by the forces of . Led by a rare alliance between the forces of the butcher Aahrgoth the Conqueror and warlord Fulvio Carro, the latter the former captain of the Aetherian Warriors' 4th Company before his betrayal over a century prior. Despite their service to rival gods, the two had both repeatedly suffered embarrassing defeats at the hands of the Aetherian Warriors, specifically their new Chapter Master, Corradino Breda, and sought revent against them by conquering their home.
The end of the and the opening of the Great Rift left much of the newly christened disorganized and vulnerable, including the worlds of the Cordoine sector. Seizing upon this opportunity, the two began a massive invasion of the Atargatis system before spreading out into the subsector. Despite taking many worlds in the initial assaults, including the of Atargatis VI and its moons, and two of the four moons of Atargatis X, fighting on the Aetherian Warriors' homeworld itself was slow and bloody, as the Chaos forces met fierce resistance from the brutal tribals and PDF but also the vicious plant and animal life native to the planet. After more than two years of fighting, the planet finally fell to the forces of Aahrgoth and Carro, the latter of which took control of the planet from his former chapter's fortress-monastery, the Aetherian Throne.