Terror Squad was an American hip hop collective that was first established in 1998. Based in the Bronx in New York City the members of Terror Squad collectively debuted on a song in member Fat Joe's albums Jealous One's Envy and Don Cartagena. Terror Squad released its debut album Terror Squad: The Album in 1999 with its first major hit "Whatcha Gon' Do" credited mostly to Big Pun who died of a heart attack in 2000. After Big Pun's death his longtime partners Cuban Link and Triple Seis left the group and were subsequently replaced by Remy Martin (later known as Remy Ma) and Tony Sunshine. In 2004 their song "Lean Back" peaked at No. 1 on the Billboard Hot 100.