To be in or see a battle in your dream suggests that you are overworked. You need to give yourself a break. There is a conflict between your rational thinking and your irrational impulses. Alternatively, dreaming of a battle represents eroticism. You may be overly stimulated or you are trying to suppress your instinctual urges.
To dream that you win a battle indicates that you will achieve balance in various aspects of your life. If you lose the battle, then it means that you are unable to escape from current circumstances.