Five commercial singles promoted Metallica's 1991 album, The Black Album.
The singles were Enter Sandman, The Unforgiven, Nothing Else Matters, Wherever I May Roam, and Sad but True. They were released over a period stretching from July 1991 into February 1993.
Don't Tread on Me is a common source of confusion. It was sent to rock radio promotionally, but it did not receive a commercial single release, so it is not counted among the five official commercial singles.
The campaign helped several album tracks become enduring staples. Nothing Else Matters became a major ballad, while Enter Sandman and Sad but True became especially prominent in live performances and sports settings.