A fortress built during the Fifty Years' War to prevent a Romandan invasion from across the Rhana Strait.
Following the defeat of the Death Corps forces at the Thieves' Fort, a deaths corps captain named Golagros Levine made a failed assassination attempt on Dycedarg Beoulve, during which Teta Hyral was taken captive. She was brought to the windmill hut in the plains near the fort, and held by Wiegraf Folles, leader of the Death Corps, as a prisoner.
Immediately, Dycedarg's brother Zalbag Beoulve and Algus Sadalfas began planning a retaliatory attack on the fort, known as the Battle of Ziekden Fortress, but Teta's brother Delita knew that such an attack would likely result in his sister's death, and convinced Ramza Beoulve to attempt a rescue from the south.
The rescue attempt did not go as planned. At Lenalia Plateau, Ramza and Delita encountered and defeated a Death Corps force led by Miluda Folles Miluda herself was killed, and word of this reached Wiegraf's ears. This infuriated Wiegraf, as Miluda was his sister. Wiegraf had Tietra taken to Ziekden Fortress, placing her directly in the path of Zalbag and Argath's advance. Ramza and Delita battled their way past Wiegraf's own forces and reached the fort, arriving to see Zalbag and Argath, the latter of which was armed with a crossbow, confronting Gragoroth, who was holding Tietra captive. As they rushed forward, Argath did the unthinkable: he deliberately shot Tietra. He then immediately fired a second shot which hit Gragoroth. Wounded, the Deaths Corps soldier crawled back inside as Tietra collapsed.
Delita's anger against Alugs boiled over. As Zalbag left to pursue Wiegraf, Delita surged forward against Algus, and Ramza, disillusioned, joined suit. Argath was slain in the resulting battle, but as Delita returned to Teta's body, Gragoroth ignited explosives with the fort. Teta, using the last of her strength, shielded Delita from the resulting explosion. The fort itself was destroyed, and Ramza fled.