Which American band released the 1991 hit single "Enter Sandman"?

The American band that released the 1991 hit single "Enter Sandman" was Metallica.

The song was the lead single and opening track from Metallica's self-titled fifth studio album, commonly called The Black Album. It was released on July 29, 1991, shortly before the album arrived in August. The song's dark lyrics draw on childhood nightmares and bedtime fears, while its instantly recognizable guitar riff helped make it one of heavy metal's best-known recordings.

The music was written by Kirk Hammett, James Hetfield, and Lars Ulrich, while Hetfield wrote the lyrics. Producer Bob Rock helped shape the polished, powerful sound that made Metallica more accessible to mainstream rock audiences. The single reached No. 16 on the US Billboard Hot 100 and No. 5 in the United Kingdom.

A common mix-up is confusing Metallica with other major American thrash-metal bands such as Megadeth, Slayer, or Pantera. Those groups were contemporaries, but none recorded "Enter Sandman." Metallica's album went on to sell tens of millions of copies worldwide.