Haleth was a Rohir Warrior, a royal Prince of Rohan. As the eldest of Helm's two sons, he was the chief Marshall of the Riddermark and the heir to the throne. He resided in the capital of Edoras, alongside his father, and oversaw the Mark whenever Helm was campaigning. When the Dunlendings and Easterlings assailed Rohan during the Long Winter of T.A. 2758-59, Haleth was entrusted with defending the eastern borders of the realm, but he recalled most of his forces to the Eastfold in order to concentrate his limited manpower and protect the capital. The Easterlings overran most of the East-mark; however, they ignored the western portion of the Eastfold, leaving the task of taking Edoras to their Dunlending allies. Wulf subsequently led the main Dunlending army to the Mering Vale and invested