To dream about being on a battlefield represents a serious struggle you are engaged in.
It is the symbolic equivalent to people taking shots at you in your waking life. You are concerned, feel vulnerable or are currently being bombarded by issues, pain or hardship. You feel that you are out in the open and vulnerable to attack or conflict. At this time, your waking life is inhabited by someone or something that can hurt you. It is one from which you must emerge victorious.
Observing a battlefield from above in a dream symbolizes your inability to intervene effectively in a situation. In other words, you want to help or have been trying to help someone but it is something that is out of your hand or you're not contributing anything meaningful.