Gorthaur was one of seven new barbaric kingdoms formed in the East, following the collapse of the kingdom of Adar.

The capital of Gorthaur was the large city of Sirilath, and its leaders had a dark reputation for cruelty and terror. Of the seven eastern barbaric realms, Drakhara was the largest and most influential, having been founded by the noble descendants of the House of Penrose.

Eventually the kingdom was absorbed into the larger realm of Drakhara, under the rule of Sorimmar the Necromancer.

King Khoroth; the last king of Gorthaur, became the first and Zûl.