"Know Your Enemy" was released on 19 March 2001. The album debuted and peaked on number 2 in the UK Album Chart, it spent a total of 16 weeks in the charts. In Ireland the album reached number 5, and around the world it was pretty successful, it peaked in number 3 on Finland, remaining 5 weeks in the Finnish charts, number 6 in Denmark number 7 in Sweden, and number 8 in Norway and in Greece. Also in Germany, Belgium and in Australia it charted within the top 20.