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 was 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
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