<P> The Uruk - hai are fictional characters in J.R.R. Tolkien 's fictional universe of Middle - earth . They are introduced in The Lord of the Rings as an advanced breed of orcs that serve Sauron and Saruman . The first uruks appeared out of Mordor in attacks on Gondor in T.A. 2475 . </P>
what is an uruk hai in lord of the rings
an advanced breed of orcs that serve Sauron and Saruman