To dream that you are in a fight suggests that you have upheaval within yourself. You are dealing with some issues that are causing you guilt or conflict. You may have been trying to bury some part of you that is fighting to be heard. This dream could also represent a real life altercation you are enduring.
To dream about others fighting in your dream indicates that you will not admit the difficulties in your own life. You don't accept responsibility for this trouble and will not do anything to bring them to a satisfactory conclusion.
To dream that you are fighting to the death suggests that you won't deal with turmoil within your own life. You won't accept being wrong or that you should change your ways.