I've added a, uh.... "short" history of Wintreath to the OP, and included it below in spoilers for those of you who want to read up and get a good idea of what the hell has gone on and led to now. It's not written as if by someone in the setting itself - that'll come later, as the RP progresses - but it's written by me so that you can understand the contexts of the setting before the RP starts.
Spoiler
Wintreath is, as the name suggests, a rather cold and blustery place. Before the ice swelled down from the Far North and covered much of the landmass, Wintreath was a mild and temperate land covered in forests, rivers and wide plains of grass and scrub. When the ice came, it stayed for around 250 years (a small ice age), covering the entire map down to a line that roughly went (on the map) from Jormving on the west coast to Foret, then to Cetera, then to Arnocen Academy and across to Janth and the east coast.
Below that, the land was still temperate and covered in forests far larger than the ones that exist today in Wintreath. The Edilian Republic was the first native Wintrean civilisation to emerge beyond hunter gatherer tribes and loose nomadic communities when magic still flowed thick in the blood of men. The Edilian peoples were closer in blood and stature to the Forebearers who created Wintreath at the dawn of time, allowing them to actively manipulate the magic in their bodies and in the world around them, creating great cities (Lenth, a city that's part carved into the peaks of mountains and part floats on massive Storm engines, is an example of their creative prowess) and new technologies that blended magic with the new disciplines of science and industry.
When the ice sheets that covered the Central Plains (aka that stretched down to that line I told you about earlier) started to melt, the volume of water that was suddenly liquid again washed much of the Edilian civilisation away, leaving only a few small settlements and the ruins of their capital city, Utorim, to carry on their legacy. As the years passed, the remnants of the Edilian peoples left Wintreath interbred with those across the Southern Peninsulas (the two bits on the bottom left of the map that go off the edge), distilling their blood. Slowly, magic slipped out of living memory and became a myth, often thought to be a misremembered tale of lost technological artifacts and the like.
When civilisation slowly began to return to Wintreath (it was mostly uninhabited after the meltwaters washed away the Edilian Republic, save for small tribes and the few remaining Edilian settlements, where magic practitioners passed into legend as the mouthpieces of the old Gods) it was in the form of the De Falvosa Line. Germaine De Falvosa was a bold and intelligent man with a following of several tens of thousands, and where others balked at the sights of the foreboding forests that now covered all of the south of Wintreath, he and his people pushed on, rediscovering Palar and Stranglor and inhabiting them as stepping stones into the wider landmass beyond the forests.
The De Falvosa Line pretty much shaped modern Wintreath into what it is now; it was under their guidance that the mega forests were cut back to something approaching their current sizes, and it was their will that had construction begin on many of the settlements that would later grow into the cities Wintreath has today. When the Kingdom of Arraia came into existence some 3000 years ago, they quickly conquered much of their surroundings with the first noted use of mounted archers (think Mongol bowmen), but the De Falvosa Line used similar tactics as well as better chain link armour, and the Arraian people fell under their sway.
No one knows if the Hunt Clan were the reason for the Origin that followed, but from their arrival just over 3000 years ago a constant war raged for some 200 years, with the youthful civilisations and societies of the south banding together in desperation with the hopes of merely surviving the onslaught.
It's at this point that the Origin show up. No one knows much about them, save for the fact that they could construct marvels of metal that defied all understandings of what should work, things that floated without visible Storm engines, devices that could kill a man from a thousand yards, huge towers in the sea that despite the distance between each was linked by crackling blue fire that spat out towards the East (Norloch Spire is one of these) towards unknown targets... They're like the aliens of the setting that arrived, did a hell of a lot of shit that no one could fathom for around a thousand years without anyone ever seeing one in the flesh, and then vanished. Some theorise that it was they who truly drove off the Hunt Clan, not the men of that age, but as there's none of them left to ask no one knows for certain.
A lot happened during the thousand years from 3000 to 2000 years ago. It was during this period that Innail became the home of House Kestar, later to be the Royal Family of Wintreath, and it was during this period that the true destructive power of the Origin was first seen - every device they'd ever constructed lit up, damaged ones repaired themselves and lifted into the skies, and the skies themselves boiled over with tumults of light and sound that left the men and women of this age shaking and trembling in fear. Almost as soon as it started, it was over, and the Origin were gone, leaving behind relics of technology or magic that even today defeat the best efforts of Wintreath's finest minds.
By the time 2000 years ago rolls up, much of Wintreath is explored (I say much, Wintreath is HUGE so there were large areas that were little travelled and left to wilderness) and the Hunt Clan have vanished again, meaning that for the first time the peoples of Wintreath can live without the ever present fear of death finding them. The Rides Kingdoms emerge in this time, a hundred hundred fiefdoms and princedoms that vie with one another for the most trade, the most land, the most whatever it is the other wants. Exactly 2000 years ago, Spiritian military forces arrive and due to their more advanced technology (basic muskets, smooth bore cannon, that kind of thing, tech from the 1700s in our world) they were able to conquer the entirety of Wintreath.
Thus begins the Spiritain occupation, wherein Wintreath was effectively stripmined for resources and the people mistreated as little more than slaves. After hundreds of years of this, the Wintreans (now unified in their hatred of their oppressors and no longer fractured kingdoms competing against one another) rise up, with the powerful Houses lending their support one after the other for House Kestar of Innail in their rebellion against Spiritus. The conflict spans almost a thousand years, as Spiritus was far more populous than Wintreath at this time and had better technology, but the constant grind wore them down as Wintreans built up a native technology base to match that of their oppressors.
By the end of the conflict, Spiritus was too exhausted to keep fighting and a much more populous and much more unified Wintreath rose from the ashes as the nation we live in today. Industrialisation had began (so 1800s tech IRL, though more steampunk and 'out there' than our tech) near the end of the occupation in Spiritus and Wintreath both, but under the control of His Majesty Inric I Witnreath advanced rapidly, discovering gearwork principles beyond those known to the rest of the world and becoming a powerhouse in its own right.
500 years of this development, 500 years of peace and prosperity, brings us to now. It's been a golden age in Wintreath, with the discovery of air travel, the invention of the modern day lifestyle (so modern day IRL tech but achieved through slightly magical means) etc etc. Wintreath has a population of millions, with hundreds of major cities and thousands of minor ones, tens of thousands of townships and countless villages, outposts, settlements and fortifications.
