There are at least seven artists with this name:
1. WAR were a popular funk group of the '70s. They mixed soul, jazz, blues, reggae, Latin and rock influences in their music. They had a very recognizable sound, due to their mix of harmonica, horns, guitar, bass, percussion, and vocals. WAR was initially formed in 1969 from a band called Nightshift to jam while Eric Burdon free-associated lyrics. They released two albums under Burdon's name, the first of which contained the hit Spill the Wine. Burdon left the group in 1971, and WAR had several major hits through the early to mid 1970s.
2. A Swedish black metal band that was formed by members of few bands including Dark Funeral, Hypocrisy and Ophthalamia. They released two albums and then changed their name to Total War. The compilation "We Are... Total War" (2001) consists of their two releases on one disc. (Check more on WAR (Swe))
3. A Polish black metal band, formed in 1993 and since split up. The band has released 4 albums and refuses to publish photographs of the members since their demo days. Lyrical themes include War, Misanthropy, Hatred and Anti-christianity.
4. Rumbling lo-fi synth/post-punk from Posh Isolation. Features Elias Rønnenfelt from Iceage and Loke Rahbek from Sexdrome.
5. An Italian thrash metal band.
6. A dark ambient/electronic band who released one album, Obedience, in 2002.
7. An unsigned American MC.