Map of Tantara in the time of Urtho
Tantara was a kingdom at the time of the Mage Wars. Leodhan was the High King, and Urtho was the Archmage. The territory of the kingdom encompassed what is now the Dhorisha Plains, much of the Pelagirs and Rethwellan, and parts of Valdemar, including Lake Evendim.
It was the last kingdom to come under attack from Ma'ar. As with previous land he had conquered, Ma'ar began by trying to destroy the central government, sending his army to invade in the midst of the resulting chaos. In the case of Tantara, this took the form of a fear spell that was triggered in the royal palace in the middle of the night. Most of the nobility fled, and many of them refused to return out of shame for their supposed cowardice. The High King was found hiding in a wardrobe. He left the palace shortly after, refusing to return.
Unfortunately, Ma'ar had simply grown too strong for the armies of Tantara to fend off. The second loss of Stelvi Pass[1] was a significant defeat. Knowing they were losing, Urtho began the evacuation using the permanent Gates. In the end, the people were saved, but the land was entirely destroyed by the magical Cataclysm that ended the war. One of the explosions was centered on Urtho's Tower. It is now the site of the Dhorisha Plains. The other explosion was centered on Ma'ar and his forces, who had taken over the Royal Palace of Tantara. That location is now Lake Evendim.