Forbidden was part of the second wave of thrash metal bands which arose from the bay area thrash scene (along with Testament, Death Angel, Vio-Lence, etc.).
These are photos from concerts where forbidden played, so they may be of other bands that played the concert as well.
Wacken Open Air 2012 Aug 2 - 4, 2012 Wacken, Schleswig-Holstein, Germany Uploaded by Grinsplinsen