This third installment of what has been hailed as "the heaviest, darkest tour of the year," the "Unholy Alliance Tour, Chapter III" will feature Slayer, the undisputed kings of extreme speed/thrash metal, and two true princes of the genre, Trivium and Mastodon.

An opening act will be announced shortly. While Slayer will close all of the shows, they will be co-billed with Trivium on the UK dates. With more dates to be announced, the initial itinerary for the European "Unholy Alliance Tour, Chapter III" is below:

OCTOBER
27 Manchester Arena, Manchester, England
28 NEC, Birmingham, England
30 Hammersmith Apollo, London, England
31 Hammersmith Apollo, London, England