“The Unforgiven” is track 4 on Metallica's 1991 album, commonly called The Black Album.
The standard sequence opens with “Enter Sandman,” followed by “Sad but True” and “Holier Than Thou.” “The Unforgiven” then occupies the fourth position before “Wherever I May Roam.” This placement helped establish an early run that moves from hard-driving riffs into one of the album's most dramatic and melodic songs.
The song was also released as a single, although it was not the album's first single. Its lyrics and arrangement contrast with the faster, more aggressive material associated with Metallica's earlier records, using quieter passages and a prominent melodic vocal line.
Later releases may include bonus tracks, live performances, and demos, so track numbering can vary in expanded editions. The answer refers to the original standard studio-album sequence released in 1991.