Spoiler Alert, click show to read: 
Souls this young and free,
Know no limits,
Now is the time,
Come!
Actually why you put these sentence on retreating peltastai? time to retreat?... Oh I know, that should be time to the Phalanx to take the peltastai's job... But I want to ask.... what's your primary ideas in these sentence?

Chronology: after the peltastai tire entire roman line with only taking some casualities, the exhausted romans got skewered by the phalangitai... exhausted men do move a lot slower and die quicker in front of Sarrisa..., except the peltastai makedonikoi, all the peltastai was retreated, rest for a long while, and then sent to either chase routers or smash the roman's opened back