Sauron is also the home
planet of a faction of humanity obsessed with
eugenics and
military conquest in the CoDominium future history of
Jerry Pournelle. Specifically focused on in the
War World series of pulp
science fiction novels.
The rebellious Saurons are fought back to their homeworld by the Imperial Fleet in 2640. Their last defenders are destroyed and the crust of their planet is cracked open by weapons of great power.
One ship escapes to the desolate prison world of Haven, with a small force of bio-engineered Cyborgs. They then proceed to dominate the inferior population in a quest to rebuild their race.