Markwasten Moor was the site of a battle during King Ranser's War, a civil war between the great houses of Rivenspire and the First Daggerfall Covenant. The Battle of Markwasten Moor was the final battle of the war. King Ranser's army lost to High King Emeric and his Orcish allies. Markwasten Moor would later be known as Traitor's Tor.
It is possible that the Westmark Moor region of Rivenspire was named after Markwasten Moor since both have similarities in their name.