Timeline

~10,000 years before the Scourge of Katoun - Belmora is a world power. The elves have built walls of glass holding back primeval night and live in eons astonishing progress. They ignore the humans and dwarves who live outside their walls. Humans have only developed to a stone age level, while the dwarves are mastering metallurgy in the mountains. The Scourge of Belmora comes when gaze of the elves pierces the sky and unleashes a tide of winged, monstrous insects that scourge the empire from the land. Humanity remembers this only as a age of dreams and terror before they mastered fire. The dwarves were able to weather the fall of Belmora by closing off their mountain fastnesses from the outside world.
~7,500 years before the Scourge of Katoun - The dwarves open the gates of Mak, their underground empire. In the ,500 years since their cut themselves off from the outside world their kingdom has grown vast indeed, filling one great peak in the Dark Mountains. The Dwarves have begun to run out of space in their mountain, and finding Ig more pleasant than they left it. They quickly form settlements across Ig, coming into contact with bands of agrarian humans. Trade between the two gets off to a rocky start, but soon the dwarven mercantile families form partnerships with tribes and family groups to supply the empire with the food it needed.
~5,500 years before the Scourge of Katoun - The dwarves of Mak delve too deep into the root of the Dark Mountains, unleashing a horde of creeping, monstrous insects. These horrors devour Mak from the inside out, and without its heart the rest of the empire soon crumbles. These are hard times, for the winters turn cold and the monstrous insects pour down into greater Ig, causing devastation to most of the dwarven settlements of the plains. Humanity, in its decentralized family-based units, escapes the worst depredations, although most of the urbanized population living among the dwarves is annihilated with the fall of Mak.
~3,500 years before the Scourge of Katoun - human progress spikes during an era of plentiful harvest. The empire of Katoun begins to coalesce around the port of Holdfast. Beneficent rulers are able to quickly expand the empire as small kingdoms and freeholds flock to the banner in pursuit of easy trade. The Knights of Katoun push the borders of the empire to the uttermost corners of Ig, laying low monstrous insects and pushing fell beasts out of the civilized lands.
The Scourge of Katoun – in a bid to discover the shape of the world, Katoun sends a fleet of ships to the south. They are never heard from again, and within 50 years monstrous insects begin to move north from across the ocean. The Dark Mountains, long quiet, vomit forth a horde of monstrous insects that lay waste to Ig. Caught between two primal forces the villages and towns turn on one another, splintering into countless tiny kingdoms that are quickly destroyed. A long dark age begins.
~900 years after the Scourge of Katoun - The campaign begins.

Timeline

Marauders of Ig grinnock