Terror-Tribe

The Terror-Tribe (Orc."Ungur-Hai") were one of several orcish tribal confederations in which the Orcs of Mordor had split after the Fall of Barad-dur in the War of the last Alliance.The Ungur-Hai delighted in the cult of death and pain and were known for torture and mutilation. After Saurons return during the years of TA 1980-2002 the remaining Terror-Orcs were reorganised and redistributed into newly founded Tribal coalitions

See:
 * Morgûl Stalkers

References:

 * Middle-earth: Shadow of war