Entire Yoker bench? 1 player who'd been substituted entered the field of play in the melee and was cautioned, your number 4 did likewise to start the whole thing but wasn't cautioned...... as the challenge in itself was nothing and in absolutely no way merited a red card which your club's video proves. One member of the Yoker coaching staff initially entered the field (as did your Manager) but only to diffuse the situation as again proven by the video highlights so don't start spreading malicious lies. The Yoker manager latterly enters the pitch to pull the player away who had been substituted. Your number 5 can clearly be seen to extend his arm in the midst of it all, whether it's aiming a punch or not is debatable.
Can I ask what age has to do with anything? If that's the case you should mention you also had several players with senior league experience playing including one who played in the Premier League??? Don't be picky, state all the facts or say nothing.