From the many school fights I witnessed, it seemed the striking arts (boxing) seemed to quell the incident more quickly than grappling. It seems a hardship punch to the face is unsettling, frightening and if sufficient, rattles the brain enough to put off further aggression.
The best tactic I ever saw was one boy, whipping down the trousers and underwear of his adversary, in blindingly fast motion, pushing him over, as his ankles were bound and running away
They don’t teach you that in Krav Maga!