Background Music

So once I had all the clips together I was looking at how everything pieced together I felt that the trailer was still missing something so I thought to add some backing music. I found a website (http://incompetech.com/) which allows you to download free music/instrumentals. I tried various background music out, I ended up using a track called clenched teeth. I Turned the volume down so I could still here the voice over, Which I wanted to be the one thing I made sure everyone could he as it would then be pointless to have the trailer. I think the background music worked well it really gave it that dramatic and urgent feel that you would get in a trailer for a war film.