Ork Empire of Charadon
The Ork Empire of Charadon is the largest and most long lasting Ork Empire in existence and has been a bane of Ultima Segmentum for countless centuries. Until recently, the expansion of the Charadon empire has been limited by the Ultramarines and forces led by Librarian Tigurius have made surgical strikes upon the Arch-Arsonist's forces, preventing them from being able to organize a full scale Waaagh! into Ultramar itself. However Tigurius's efforts are beginning to wane in the wake of Tyranid enroachment into Ultima Segmentum as the Ultramarines can no longer spare troops to hold the nearby Ork empire in check. The Ork Empire of Charadon has seized its chance and recently invaded the Ultramar system.
The Ork Empire of Charadon under Arch-Arsonist Snagrod infamously invaded Rynn's World, homeworld of the Crimson Fists Space Marine Chapter, in 988.M41. The ensuing battle saw the near total destruction of the Crimson Fists and the destruction of their fortress-monastery.