I Declare War

I Declare War may refer to:


 * I Declare War (band), an American deathcore band
 * I Declare War (album), a 2011 album by the band
 * I Declare War (film), a 2012 Canadian action comedy-drama film
 * "I Declare War", a song by Pacewon
 * "I Declare War", a song by Nardo Wick from the Judas and the Black Messiah soundtrack