European Carnage Tour was a European tour headlined by American thrash metal bands Slayer and Megadeth. This tour marked the first time that both bands had toured Europe together since the Clash of the Titans Tour in 1990 when support was provided by Testament and Suicidal Tendencies. Slayer and Megadeth had previously toured together in North America on American Carnage Tour in 2010, with Testament and Anthrax as the supporting acts. Gary Holt of Exodus was announced as Jeff's temporary replacement, in Slayer, on March 13, to April 4, 2011.