Casualties of War is the fourth studio album by American hip hop supergroup Boot Camp Clik. It was released on August 14, 2007 through Duck Down Music, and is compiled of leftover tracks recorded for the group's previous album, 2006's The Last Stand. Recording sessions took place at CDR Studio'z in New York. Production was handled by Coptic, Dan the Man, Soul G, Marco Polo, 9th Wonder, Chris the Four, Dub Z, Fred Bear, Jaywan Inc., Marvel da Beat Bandit, Moods and Vibrations Prod. and Nottz, with Buckshot and Drew "Dru-Ha" Friedman serving as executive producers. The album features contributions from seven of the eight original members with O.G.C.'s Louieville Sluggah being the only absent member, as well as guest appearances from Ruste Juxx, Supreme, 5ft, Blue Flame and G-Tang.

Boot Camp Clik is an American hip hop supergroup from Brooklyn, New York City, which is composed of Buckshot, Smif-N-Wessun, Heltah Skeltah and O.G.C.. Most of the members are from Brownsville, but Buckshot is from Crown Heights and Tek is from Bedford-Stuyvesant.