The Lord of the Rings: Shadow of the East
Uruk-hai is the common name for the large soldier-orcs of Mordor and later also Angmar. These Great Orcs dated back at least as far as the end of the Second Age; some of them were present in the band that attacked Isildur, and indeed their losses were so grievous in that attack that they were not seen again for many years. They were clearly dangerous combatants, and with their loss the other Orcs, though victorious, made no further attacks of the same kind.
The Uruk-hai are very large black orcs of great strength. They are larger and stronger than other breeds of Orc and consequently look down upon and often bully them.