Once I broke up the initial fight, and called the local law, I would have stood by the victim until they arrived, and detained whoever I could have safely. If the 2 assaulters returned, I would have warned them off, and if that didn't keep them from attacking, I would have no qualms whatsoever using force to make it happen. A shove, arm bar to a face plant, whatever was necessary.
Like McDonald's, I believe in giving the customer what they order
Busting thugs since 1992