Severan Dominate - History and Culture: The origins of Human civilisation upon Cuyavale are unclear. Initial Imperial studies indicate that the world's two populations -- one subterranean and the other arboreal -- both originated at roughly the same time.However, the reasons for their split and continued isolation are lost to time. As there are no known surviving records that predate Humanity's activity in the region prior to the Great Crusade in the late 30th Millennium, none are certain when the region might have been first colonised. Adeptus Mechanicus agents might be able to make an estimate after obtaining biological samples, but there are currently no records of anyone conducting such a test.Humanity first began to colonise Cuyavale in the distant prehistory of the Age of Technology before the time of the Great Crusade. When remnants of the Angevin Crusade reached the distant world in the 39th Millennium, they were surprised to discover the hallmarks of Human life.Further exploration soon revealed two separate populations, which continued to thrive in spite of the world's deadly predators. After re-establishing contact, the Ecclesiarchy committed missionaries to the world, so that the surviving Humans might learn the glory of the Emperor.While the Imperial Creed now flourishes upon the planet, their physical distance from the remainder of the Calixis Sector has limited the amount of interaction between Cuyavale and the agents of Terra.The arboreal populations largely dwell within Cuyavale's enormous trees. These Humans seldom descend to the world's surface, and many spend their entire lives within the boughs of a small grove of trees. Communities are entirely dependent upon the bounty of the tree in which they dwell, and the organisms that live among the enormous plants.While many of these species are able to directly exploit the tree's biological processes, others merely take advantage of the microclimates that the trees create. These include a broad range of arboreal animals, as well as lesser plants and fungal analogues that have evolved to dwell among the trees. The native Humans who live in this environment have domesticated many of these plants for agricultural purposes.In contrast, the subterranean population lives far beneath the trees, among caves, believed to be the remnants of water flows and root networks that have long since rotted away. These natives are accustomed to lives of perpetual darkness. Their diets are largely based upon fungal growths and the few animals that dwell in the deep shelter of the trees, as they live in perpetual fear of, but relative safety from, the planet's Drakons.Since the advent of the Severan Dominate, the Secessionist stellar nation has drawn recruits from both of Cuyavale's Human populations. Some of these forces have been used in defensive efforts directly upon the planet, as Ork forces have recently begun to assault the world.To date, the Orks have focused much of their efforts on attempts to tame the massive Drakons at the same time as they engage the disparate Human communities. So far, the xenos have had early success in controlling the Drakons, with at least one beast serving as a sort of aerial transport for the violent Orks.