In the year 1 TD, or 2790 HM, Andaria in its entirety is shaken by tremors. Many sensitive magical artifacts are interrupted for several minutes. This event is retrospectively interpreted as the arrival of the first of the Old Ones: Yog Sothtoh.
Also known as the Third Age, it began with the arrival of the first Old One in the year 2790 HM and lasted for 300 years.
In the year 1 TD, or 2790 HM, Andaria in its entirety is shaken by tremors. Many sensitive magical artifacts are interrupted for several minutes. This event is retrospectively interpreted as the arrival of the first of the Old Ones: Yog Sothtoh.
In the year 71 TD the until now neutral human kingdom Varteck declares war against Rocelia. The kingdom of Great Lixis expands over its previous territory, the nowadays Ökniröi Valley and increases its sphere of influence rapidly.
It is not exactly known when Nyarlathotep was summoned into this world, but his first appearence is dated by sages at least in the year 221 TD when the Convergences of Worlds occured. Some estimate that he is also to blame in some form for the revolution in the kingdom of Krostov.
Hastur was apparently the first Old One being summoned by Yog Sothoth into the Material Plane. His first recorded appearence was in the year 130 TD as the great revolution ravaged the human kingdom of Krostov, that expanded over the nowaday borders of Lixanthia.
In the year 130 TD the human kingdom Krostov suddenly collapses followed by a brutal revolution.
Sages date the arrival of Cthulhu onto the Material Plane circa 155 TD. His first datable action was the triggering of the tsunami, which hit the coastline of nowaday Erzcanyon and Thrandelhaven.
In the year 165 TD a tsunami sweeps over the northeast of the andarian coastline and destroys on its way great parts of the human kingdom Varteck. Varteck collapses under the chaos and Great Lixis rapidly sends help in form of food and troops, taking indirect controll over the complete area.
In the year 170 TD Great Lixis allies with the Caliphate Jakkur and together they attack the complete western border of Rocelia. Rocelia having forseen the signs of war multiplying is prepared and has reinforced its fortresses with dwarven armies, repelling the attackers.
In the year 205 TD the entirety of the island Goldhaven sinks to the depths of the ocean and with it a large part of the dwarven imperium.
With the Sinking of Goldhaven in 205 TD most dwarves head to Silvershield and Rocelias defenses are weakend. Taking the iniative the alliance of Great Lixis and Caliphate Jakkur increase the attacks at Rocelia. For the second time in history battles take place on rocelian territory. Only the sudden emergence of the Red Lands and with them the appearance of the first werebeast, that hunt any living thing in their territory manage to thwart the military initative of Great Lixis and Caliphate Jakkur.
In the year 221 TD the Andaria trembles again as the Convergence of the Worlds happens. For three weeks rifts appear mostly around East Andaria allowing passage between Langraan and another world; through these rifts the first dragonborns cross into Langraan. The newcommers, who come to Andaria in hope of a new beginning, quickly come into conflict with the already existing human kingdoms.
In the year 222 TD discussions between Rocelia and a delegation of the first greater werebeast grouping take place. The werebeast assist Rocelia against the invasions from Great Lixis and the Caliphate Jakkur and in return Rocelia helps the werebeasts to found an own independent country.
In the year 227 TD Ahzwaor, the Great Devourer, was summoned by Yog Sothtoh deep into the southwest of Andaria resulting in the complete destruction of the kingdom Sekarlin and everything around it. All that is nowadays left is the crumbled dust amounting to the Sekarlinian Desert.
In the year 248 TD the Angelic Alliance is founded to fight against the ever-growing influence of Great Lixis. Its founders are the Deep Conglomerate and with it the Aydra Mercurial, Rocelia, the newly founded Silvershield and Yetheloth.
In the year 253 TD the Caliphate Jakkur spirals into a bloody civil war and surrenders to the Angelic Alliance.
In the year 259 TD the kingdom Erohald is defeated and than occupied by an army composed of dragonborn and dwarfs.
In the year 260 TD the Great Lixian fortresses in the Nohir Cimes are conquered with the help of the Iluruvaxian gnomes and grinded down.
In the year 261 TD begins the siege of the Twin Fortresses protecting the entrance to the nowadays Ökniröi Valley. After three years of siege they finally fall.
In the year 273 TD after years of sieging the capital Lixis, Iolatan himself intervenes into the conflict. In a whiff of wind most of the city crumbles to dust and all living beings in a radius of 15 miles get turned to stone. With the fall of Great Lixis the Angelic Alliance members retreat to their respective homelands and leave the previously occupied kingdoms to themself.
In the following years all Old Ones except Nyarlathotep are hunted down and eternally caged.
Ahzwaor in the year 281 TD, Cthulhu in the year 288 TD and Hastur in the year 300 TD.