The slaves fight on to Pulex's left taking many casualties but holding their ground. Then to their surprise, panic rips through their Macedonican opponents. The destruction of their 1st Cohort has left the Macedonicans exposed and vulnerable, they try to fall back again.
As they start to fall back they are over taken themselves by the hordes of slaves and cut down. They fight on bravely but by sheer weight of numbers, the slaves break their shield wall and butcher them.