Here’s is my newly completely revision of the region of The World Unknown called Sundered Thyatis. This map is now final and won’t be changed again. Each hex is equal to 8 miles. Here is a direct link to the full-sized version.
After the Devastation War ends in AC 1074, it takes another 101 years before a new Age of Heroes arises on Mystara. In the Old Known World, the expanding lands of the hin officially become known as The Ten Shires in AC 1175.
Before this time period, the Old Known World suffers through the war and a time period that will become known as the Second Traladar Dark Age. The Empire of Thyatis, along with Darokin, Glantri, and the Isle of Dawn are the hardest hit in the first year of the Devastation War (AC 1013). The Five Shires, the Kingdom of Karameikos, and the island realms of the Sunlit Sea are initially ignored by the Alien Immortals, but over the next few years they also come under attack.
Both Karameikos and Thyatis are left in ruins due to a massive tidal wave caused by the crash of an Alien Immortal Skysphere into the Sea of Dread. The tidal wave wipes most of the civilizations of the region including not only Karameikos and Thyatis but also Ierendri and the Minrothad Guilds.
However, a good portion (91%) of the Karameikos population survives with most of them deciding to migrate west (eventually all the way to Farend). The rest either stay in the region, to rebuild, or migrate to other lands. This is how New Traladara came into existance, for the Thyatians were not as lucky — only 41% of the population of mainland Thyatis survives (roughly 1,107,000).
The rest of Thyatis’ population is killed by the tidal wive, but the Immortals step in resurrects them in a new Hollow World created after the Alien Immortals find and invade the Hollow World. This new Hollow World is a hidden dimension created to be next to impossible for the Alien Immortals to find.
The surviving Thyatians are displaced to other lands with 42% of the survivors (roughly 464,940) choosing to flee across the Sea of Dread to the Thyatian Hinterlands on Davinia. Thos that remain behind in the Old Known World come either relocate to part of the Isle of Dawn (where welcome) or help build the foundations of what will become the Zendrolian Republic.
The toughest of these displaced Thyatians refuse to leave their homeland and once the waters recede, they reclaim much of what was once the County of Hattias, although that island was torn asunder by the tidal wave and battles between the Immortals of Mystara and the Alien Immortals. Eventually, a new island kingdom called the Thyatian Thalassocracy arises on these islands and old conflicts are renewed between the Thyatians and the Traladarans.
In these conflicts, it is the Thyatians that are primarily the underdogs, as New Traladara comes to claim most of what was once mainland Thyatis. Life is hardly perfect for the Traladarans, however, as they have enemies in not only the Thyatian Thalassocracy but also the Zendrolian Republic. The leaders of that republic see there land as the rightful heir to the old Empire of Thyatis and they work tirelessly to undermine New Traladara. The republic’s soldiers challenge the borders of the Traladarans and hire privateers from the Thalassocracy to sink enemy ships.
Also on the map are Alfeisle, Blackrock, the Vorenth Verge, and a small part of the growing hin empire known as The Ten Shires.
While a large portion of Alfeisle sunk after the tidal wave hit, a good number of the island’s populace survived due to the power of the island’s hidden Tree of Life. However, the tree’s protection didn’t save everyone and the tree died soon after the waters receded. What was left is a darker Alfeisle that has gone almost completely savage. Non-elves are unwelcome here and that includes even gnomes and the hin. Rumors abound that lycanthropy runs rampant through the elvish population on the island. It is known that there are shadow elves living among the other elves of Alfeisle.
Blackrock is a den of pirates. Piracy in the Sea of Dread rose sharply after the Devastation War ended and Blackrock became the stronghold of the best of them (or worst of them, depending on your point of view). The hilly island is a wild place where freebooters come to anchor in the shallow harbors protected by Pillager’s Reef. There isn’t a true government here and there is only one village that sits high in the mountains of the center of the island. Blackrock Mount is where old pirates go to retire, although some say it is ruled by a powerful wizard and pirates are not welcome. The truth probably lies somewhere in between.
The Vorenth Verge is another bastion of displaced peoples. Its populace is made up of a hodgepodge of dozens of races including not only humans and demihumans but also humanoids and stranger breeds. Much of the island rose from the depths or was once part of an island controlled by either Thyatis or the Minrothad Guilds. However, since there are very few ruins from the previous age on the island, it next to impossible to determine what was once under the sea and what was part of an old island.
Regardless, all agree that Apertum Isle (*) is one dangerous place better left to those who choose to live there (usually, because they are not welcome elsewhere). The islands primary community is Vorenthus and is primarily Thyatian in population with a few Traladaran families, as well as orcs, half-orcs, hobgoblins, and half-elves exiled from Alfeisle. On the other side of the island is New Malfton, which doesn’t recognize Vorenthus as the ‘capital town’ of the island. Its populace is a mix of peoples but is primarily human, hin, gnome, and rakasta. Elves and half-elves are welcome in New Malfton, but there is one elvish family who lives in the town. The rest of the island is a divided place. The divisions are mainly geographical.
(*) Not everyone agrees that Apertum is what the island should be called. And the political name ‘Vorenth Verge’ is relatively new and is used mainly by those not living on the island.
Finally, the map shows the extreme eastern parts of The Ten Shires. Darkshire is what is left of western Thyatis and eastern Karameikos. It is the most untamed shire and most in the hin empire consider it a borderland more than a true shire. Darkshire is where the hin let most non-halflings live in their growing empire, although the handful of island of Isleshire are also places where the hin let humans live in the empire. In Darkshire, there are dwarves and gnomes in the Rugalov Uplands and fanatical elvish adventurers often brave the cursed woods of Old Vyalia to try to revive the land or retrieve lost relics.
The World Unknown: Sundered Thyatis