There are multiple artists that perform under the name This Means War:
1. A metal band from West Sussex, South England
2. A Groove/Thrash metal band from Belgrade, Serbia
1. This Means War are a new breed of mental metal from West Sussex, South England.
2. This Means War are a Groove/Thrash band with Death Metal influences, from Belgrade, Serbia, formed in 2004. For more information, you can visit their websites:
https://ithismeanswar.bandcamp.com
https://www.facebook.com/ithismeanswar