The Warrior's Code

The Warrior's Code is the fifth studio album by the Celtic punk band Dropkick Murphys. Released in June 2005, it is also their bestselling. It features a dedication to Lowell's own "Irish" Micky Ward who is featured on the album's cover and is the subject of the album's title track. It is also their final record with Hellcat Records before moving to their own vanity label, Born & Bred Records. The album was the first to feature band members Tim Brennan and Scruffy Wallace.

The album features one of the band's biggest and most well known singles, "I'm Shipping Up to Boston", which the band originally released on the "Fields of Athenry" single, although it was re-recorded for The Warrior's Code. The band released the song on their own as a single in 2006. However, it became a hit after being featured in the Oscar-winning movie The Departed and its soundtrack.

The band filmed music videos for the singles of "Sunshine Highway", "The Warrior's Code" and two videos for "I'm Shipping Up to Boston", the second was used featuring footage from The Departed. The album also features the bonus track "Tessie" which was released as its own single and music video in August 2004.