500
According to Caesar, what is ONE of the three things Pompey's men began to do? This occurred after Pompey's men ran forward toward Caesar's men.
1. They began to press on/attack all the more fiercely (hoc acrius instare), 2. They began to arrange themselves by squadrons (se turmatim explicare), and 3. They began to go around Caesar's battle line from the unprotected side (aciem nostram a latere aperto circumire)