Punk band 7 Seconds was formed in 1980 & is the first band to call themselves Hardcore. They are also the first straight edge band.
They broke up in 1993 but reformed with a new line-up. They would subsequently break up & reform several times going through several member changes in 1995, 1999, 2004, 2013.
In 2018 they announced retirement citing that they were irrelevant, but they have subsequently played in 2022 & 2024 at festivals.