Dreaming about a war or a battle suggests that the dreamer has internal conflict. One part of personality or psyche may be battling with another for control and the dream reflects this internal war. Another reason for dreaming about war is that you may be faced with a situation that requires you to be aggressive or assertive and to come to terms with opposition. War veterans and others who have experienced war first hand may, from time to time, have such dreams based on memory and trauma.