Five singles were officially released to promote Metallica's 1991 self-titled album.
They were “Enter Sandman,” “The Unforgiven,” “Nothing Else Matters,” “Wherever I May Roam,” and “Sad but True.” Together, these releases helped make the album unusually accessible to radio audiences while retaining Metallica's heavy sound.
The singles were issued over an extended period rather than all at once. “Enter Sandman” led the campaign in July 1991, while “Nothing Else Matters” followed in April 1992. “Sad but True” was the final commercial single, released in 1993.
“Don't Tread on Me” is a frequent source of confusion. It was sent to rock radio shortly after the album's release but did not receive a commercial single release. That is why it is not included in the official count of five.