Metallica's 1991 album, also known as The Black Album, debuted at number one in 10 countries.
That international result showed that the album's impact was not limited to the United States. It combined Metallica's established heavy-metal identity with a cleaner, more deliberate production style, allowing the record to connect with a much larger global audience.
In the United States, the album also debuted at number one on the Billboard 200 and remained there for four consecutive weeks. Its first-week sales reached 598,000 copies in the U.S., while the album's singles helped maintain attention across different markets.
The number refers to countries where the album opened at the top of the national album chart. It does not mean that the album reached number one in every country where it was released, nor does it count later returns to the top of a chart. Chart systems and reporting periods differed between territories.