Hostility 
To dream of hostility indicates an unexpressed intense aggression boiling from your core. This may be manifested in an uncontrollable way. Your mind is warning you that this bomb of negative emotion might explode soon. Do not allow yourself to lose control.
Paintball
To dream of participating in a paintball game may mean that you are potentially under emotional fire in your waking life. Although the hits won't kill, you are still suffering under the attack and dealing with hurt sustained from it. You may be ducking and weaving within your emotional relationship rather than enjoying it at this time.
To dream of hitting your opponent in rapid fire may suggest that you are emotionally hurtful and may need to forgo your pride and be first to put down your weapon.
Aggression
To dream about being aggressive represents stifled carnal desires. It also refers to some dilemma you are dealing with.
Battlefield
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.
Martial Arts
To perform martial arts in a dream represents self-control, balance and discipline.
To dream of being attacked by a martial arts master indicates you have doubts about your own ability to exercise self-discipline. You are beating yourself up over imagined weakness in your character.
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