The Unholy Alliance Tour

The Unholy Alliance Tour
Tour by Slayer
Lamb of God
Mastodon
Children of Bodom
In Flames
Thine Eyes Bleed
Unholy Alliance Tour.jpg
Legs3

The Unholy Alliance Tour is a biennial heavy metal concert tour of Europe and North America, with the tag-line "Preaching to the Perverted". The tour is headlined by the thrash metal band Slayer, and featured Trivium, Amon Amarth and Mastodon in its latest edition.

Europe 2004

The 2004 European edition of the tour featured the following bands: Slayer, Slipknot, Mastodon and Hatebreed.