I like it
I'm actually writing a war-themed song myself right now. :] It flows really nicely and does fit the war-type sound. If you want a criticism on it, the only one I can give is that the lead string is a little so synthy, so my suggestion would be to find a more realistic sound to use. Other than that, I can't force anymore criticism out. lol
Did that siren sound come from a program called Virtual DJ? Just wondering. lol I like how the note of the siren matches the chords of the song.