The music must be dictated by the nature of the intro movie. If the intro movie begins with June 22, the music must be of German nature (i.e., german march music or even the foot-stomping theme sung by the german tankers in the movie "Patton"). As the tide of the war turns (again, if this is depicted in the intro movie), the music should change to a clearly russian theme (perhaps the national anthem as a suggestion). In any event, the last frames of the movie intro must show the famous scene of the russian flag being raised over Berlin. One furthr note on the russian music score, if the intro movie shows scenes of Stalingrad, or of the first russian winter offensive, i would suggest Tchaikovsky's "Winter Dreams" as the background music.