Killswitch Engage is an American metalcore band from Westfield, Massachusetts, formed in 1999 after the disbanding of Overcast and Aftershock. Killswitch Engage's current lineup consists of vocalist Jesse Leach, guitarists Joel Stroetzel and Adam Dutkiewicz, bassist Mike D'Antonio, and drummer Justin Foley. The band has released eight studio albums and three live performance albums. Their eighth studio album, Atonement, was released on August 16, 2019.

The End of Heartache is the third studio album by American metalcore band Killswitch Engage. It was released on May 11, 2004, through Roadrunner Records. It is the first album to feature lead vocalist Howard Jones and drummer Justin Foley. It received positive acclaim from critics.