During a solo playtest between Russian vs French cavalry forces somewhere deep in Russia, I was playing 'mood music' with the soundtrack from the movie "Enemy At The Gates" (WW2 Russians defending Stalingrad). During this music the French die rolls were, even for my standards, very low so losing combats, failing courage and/or rally tests. However, immediately upon its ending, Russian rolls then became horrible, losing 2 vs 1 combats, failing to move, etc.
Coincidence? Probably not....