Based on all of the definitions I can find:
I understand aggressing is always offensive, whereas asserting can be offensive and defensive. I understand aggressing attempts to take or overtake something, while asserting only offers something. I understand aggressing can be physical or communicative, while asserting is only communicative.
Do you concur? Do you recognize a significant distinction I've missed? It seems to me that someone can be physically assertive, someone can aggressively defend themselves, and aggression can be done the beginning, middle and end, unlike all of the definitions that claim it only happens at the beginning. it's pretty muddy for me...hoping you can make it much clearer.