After the defeat of the Rebel Alliance at the Battle of Endor, the Empire launched several military campaigns to subdue rebel systems. Foremost amongst the leaders of these campaigns was Grand Moff Hor, widely recognised as the finest military mind the Empire had.
The Rebel Alliance had been an attempt to usurp The Emperor and replace him with a ruling psychic elite that would have split the galaxy into a two tier social structure with a superior ruling class and a vassal class below them. This nightmare avoided, it fell to the Empire to unify humanity and eradicate the last of these psychic witches that threatened the future development of mankind.
At some point during these campaigns of unification Hor got corrupted by remnants of the heretical Jedi faith and turned traitor and launched an attack upon Coruscant, determined to usher in a new age of psychic elitism with himself on the throne of Coruscant. Fully one third of the Empire's forces followed him, one third remained loyal to Emperor Palpatine and one third tried to remain neutral as the Galactic Empire burnt in civil war.
Ultimately Hor was defeated. Leading 12th Stormtrooper Legion "The Eaters of Worlds", Hor killed the loyalist Grand Moff Sanguin, head of the 9th Stormtrooper Legion "The Angels of Blood" and greviously wounded Emperor Palpatine. Hor was distracted from landing the telling blow by a sole Imperial Trooper known to history as Olan Pu, allowing Palpatine to slay him. Hor's forces fled from Coruscant bearing his corpse, intending to clone it.
Mortally wounded, Ugnaughts encased Palpatine's shattered body in a Golden Throne allowing him to use his psychic might to shepherd humanity in the dark centuries to come.
Many millenia pass and Palpatine's Empire has sunk into a morass of religious bigotry and superstition.
IN THE GRIM