Sauron's Great Miscalculation

[Inziladun]

Originally Posted by Kuruharan

It brings up the question again of what the Men who followed Sauron willingly made of the situation. Their god's actions and tactics had such a clearly detrimental impact on them and he made them fight alongside vile, monstrous creatures which it would be inescapable to understand that they were his primary grunt-work servants. What benefit did the Men of Darkness think they were getting out of this arrangement?

Well, the men of Rhûn and Harad had a history of war with Gondor. Sauron used that old hatred and probably promised them spoil and land, like Morgoth in the First Age.