This is a metal song about defending christianity and fighting against it's enemies. The video is from a wargame so don't think it's what the song is about, but it's still a video about good vs evil.
You might like this song since it's about fighting to save christianity. I hope you do.
https://www.youtube.com/watch?v=09K2Zpx8B5w (http://www.youtube.com/watch?v=09K2Zpx8B5w#)
here's a verson with lyrics.
http://youtu.be/2JXLogU76xs (http://youtu.be/2JXLogU76xs)