Know Your Enemy (Green Day song)

"Know Your Enemy" is a protest song by American rock band Green Day. It is the third track on their eighth album, 21st Century Breakdown, and it was released as the lead single through Reprise Records on April 16, 2009, and the group's first single since "Jesus of Suburbia", released 4 years earlier. Billboard described the song as being lyrically "just as politically charged as last time (on American Idiot)", having a "Modern Rock radio-ready chorus", whilst the song's producer Butch Vig "brings enough punk sheen for mass appeal." It was the first, and one of only three songs, to top the Rock Songs, Alternative Songs and Mainstream Rock Tracks Billboard charts at the same time. "Know Your Enemy" has been certified Gold by the RIAA and has sold 798,000 copies as of August 2010.