When we are faced with someone whom is in an aggressive mood, our instant reaction is to mirror them and become angry and aggressive back. It requires a great deal of self control in order to give back peace and calm.
Aggression is based in anger and thus based on fear. Be that it is rising up within you or that you are facing aggressive behaviour. There is always an underlying reason for the fury of feelings which are arising up within.
Aggression is seperate from anger, as we can feel anger as an emotion without expressing it. Aggression is the act of projecting that anger in any form, be that verbal aggression or physical aggression.
Please visit the link below to read more on Dealing with Aggression