Construction begins on the Sharksbane Wall (uniting the existing tower garrisons) designed as a barrier against the sahuagin incursions, stretching between the Akanapeaks of northern Chessenta and southwesternmost Altumbel, southwest of Delthuntle by clergy of Deep Sashelas, Trishina, and Eadro. »
Fall of Jhaamdath
The Twelve Cities of the Sword are destroyed by a gargantuan tsunami raised by the elven High Mages of Nikerymath. This event reshaped the coastline into the contours of the Vilhon Reach known in the present day.
Some survivors settle in Altumbel. »
-100 DR to 250 DR
Jhaamdathan settlements dot Altumbel's islands, and Chessentans colonize a broad stretch of coastline from Delthuntle to Laothkund. »
Altumbel is founded by the empire of Unther, but is inhabited only by itinerant pirates and the odd hermit or two looking to escape from more populated domains. »
Darthorn II Mirandor becomes king of Impiltur with the death of his father Tarth. During his reign Darthorn II defeats pirate raiders from Altumbel. »