There are at least 5 artists called Mercenary:
These are photos from concerts where Mercenary played, so they may be of other bands that played the concert as well.
MASTERS OF HARDCORE on Tour Aug 23, 2014 Vallgorguina, Catalonia, Spain Uploaded by Sssinistre
Beastival May 30 - Jun 1, 2013 96160 Geiselwind, Germany Uploaded by Laza
Wacken Open Air 2008 Jul 31 - Aug 2, 2008 Wacken, Schleswig-Holstein, Germany Uploaded by Kafroman
The Haunted / Mercenary / Fear My Thoughts Nov 3, 2006 Paris, Île-de-France, France Uploaded by Thierry F
Green Carnation / Evergray / Mercenary / Arch Nemesis / Tonka Aug 22, 2003 Sandefjord, Vestfold og Telemark, Norway Uploaded by Jarle Lindeland