"Fight 'Em 'Til You Can't" is the first single from American heavy metal band Anthrax's 2011 album Worship Music. It is also notable for being the band's first original single with lead singer Joey Belladonna since 1991. The song was released on June 24, 2011 for free on their website.

The title is a quote from the television series remake of Battlestar Galactica.

In regard to the release of the song Anthrax posted the following statement: "To all of our friends around the world Anthrax fans are the most loyal fans ever. You've been waiting a long, long time for us to release new music. With Joey back in the band, we know that the anticipation is really high, and we love you for that. So, as a way for us to say THANK YOU, we decided to make our brand-new track, Fight 'Em 'Til You Can't available as a free download, giving all of you a taste of what's to come on our first new studio album in eight years - "Worship Music" that will be out September 13. Thank you for sticking with us my friends and now join us on this zombie killing thrill ride we call Fight 'Em 'Til You Can't."

There is a slight difference between the album version and the single version. The spoken intro in the single version is slightly distorted, but is much more clear on Worship Music.

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