Run is an important pivot in Sauron’s future power base. The inhabitants of these lands, the Orientals, were more than one important parts to force. The Dark Lord’s greatest strength is revealed in his influence over Rhûn.
The Threat of Rhûn – The Easterners
There are opposites that cannot be reconciled. fire and water, cat and mouse, the Orientals and the free peoples of the West. The people of Rhûn pass through the three ages in conflict with the West.
In the first age they were secretly associated with the apostate valar Melkor. Melkor’s successor Sauron also recruited troops for his armies here. The Orientals have a rather primitive culture and born to fight.
This war-trained elite makes you crucial part of Sauron’s army out and so is strategically very important for him. Even in the Third Age, at the time of the original Lord of the Rings trilogy, the Western races still struggle with them.
Sauron: Master of Manipulation
In the literary setting, Sauron gives one of his rings of power to Khamûl, a king of the Orientals. This achieves great power through the ring and becomes a mighty magician until he corrupt the power of the ring and to one of Nazgul Powerful.
Here it is seen Sauron’s true strength, which is in no way based on physical strength or magical abilities. Its real strength is sow discord and pit people against each other. Again and again.
Isildur, Boromir, Théodin et al entire peoples succumb to its manipulation and his promise of power. But this power is only borrowed, because in the end he remains the mastermind, the ruler and the Lord of the Rings.