The Irish rock band U2 has released 15 studio albums, one live album, three compilation albums, 84 singles, and nine extended plays (EPs). The band formed at Mount Temple Comprehensive School in 1976 as teenagers. In 1979, the group issued their first release, the EP U2-3, which sold well in Ireland. The following year, the group signed to Island Records and released their debut album, Boy. It reached number 52 in the UK and number 63 in the US. They followed it up with the release of October (1981) and War (1983). War was a commercial success, becoming the band's first number-one album in the UK while reaching number 12 in the US. The album included the singles "Two Hearts Beat as One", "Sunday Bloody Sunday" and "New Year's Day". On the subsequent War Tour, the group recorded the live album Under a Blood Red Sky and concert film U2 Live at Red Rocks, both of which sold well and helped establish them globally as a live act.