If you were in the opponent's tent, is it *YOUR* ground, or is it theirs?
Do teams not have a right to keep their tents free of opponents?
If *YOU* are in the wrong place, why shouldn't you be forced to move?
I think your question may be quite relevant at trial.
Also relevant would be issues of “reasonable force” and “disparate force”.
Ask yourself the question, “What would a female police officer do if similarly assaulted by those twins?” Do you give her the chair?
Also relevant is whether there was an opportunity to retreat from the assault.
I don’t think “stand your ground” issues matter if retreat is not an option.
A lot will come down to what choices did people have at various instances of time and what choices they made.