Know Your Enemy is the sixth studio album by Welsh alternative rock band Manic Street Preachers. It was released on 19 March 2001 by record label Virgin. It was supported by four singles; two of them, "So Why So Sad" and "Found That Soul", were released on the same day for promotional purposes.
 
Know Your Enemy was a commercial success, albeit not as successful as its predecessor This Is My Truth Tell Me Yours. Critics were somewhat divided in their opinions, but its reception has been mostly positive.
 
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.
 
Four singles were released, So Why So Sad and Found That Soul were released on the same day, the other two Ocean Spray and Let Robeson Sing were released later. All the four singles charted within the Top 20 in the UK Singles Chart. The album has reached the Top 10 in seven countries, it peaked at number 5 in the European charts and since its release on March 2001 Know Your Enemy has sold more than half a million copies worldwide, with more than 200.000 of those being in the UK alone.