There are several bands using this name:
These are photos from concerts where Relentless played, so they may be of other bands that played the concert as well.
Funeral for a Friend / Relentless / Dollarosa May 8, 2013 Fortitude Valley, Queensland, Australia Uploaded by Wattoson
Break The Ice 2013 Apr 27 - 28, 2013 Lilydale, VIC, Australia Uploaded by Miss Alicia