Dunlendings

The Men who occupied the land of Gondor that was later given to the Rohirrim and the Dunlendings left for the hills. For this they consider them enemies and at several occasions tried to drive them out of Rohan but failed. Saruman gathered them to Isengard as his allies, both wishing to defeat the Rohirrim. The Dunlendings were used by Saruman with his Orcs to breed the Half Orcs.