Power, authority, protection, aggression, defensiveness. Pay attention to what role the warrior or soldier is playing in the dream, and how you feel about the individual.
Feeling protected by a soldier can mean you're feeling protected in your life, or you feel a need to be protected.
Feeling threatened by soldier can mean you're feeling threatened by authority figures or the abuse of power in your real life.
Being a soldier (and you're not in real life) can represent a feeling of power or wish for more power, a responsibility to fight or protect, or feelings of aggression or defensiveness.