Five commercial singles promoted Metallica, commonly called The Black Album.
The five were “Enter Sandman,” “The Unforgiven,” “Nothing Else Matters,” “Wherever I May Roam,” and “Sad but True.” Together, they helped sustain the album's visibility over an extended period and became some of Metallica's most recognizable songs.
“Don't Tread on Me” can cause confusion because it was issued to rock radio after the album's release. However, it did not receive a commercial single release, so it is not included in the total of five.
All five official singles charted on the Billboard Hot 100. Their release strategy helped the album reach listeners beyond the band's established thrash-metal audience and supported its unusually long commercial life.