Yeah what Ludens said basically. By the late 1st century BC the Greeks were slowly realising that some form of light infantry was needed, and seeing as how the rest of the world had light infantry that always carried javelins for use before charging into melee, that's what most Greek light infantry does but they are named peltasts, whereas the peltasts we know and remember from vanilla RTW are called Akontistai...

...If only the Greek generals had figured out how light infantry and cavalry should be used with an army of slow moving, in-flexible phalanx troops.

But i have to keep pointing this out to make sure the EB team don't forget to fix it... Akontistai and other poor light skirmishing units are way too powerful with their javelins! They knock off a tenth of your unit with each volley and by the time they're done throwing your army is as thin as the leaves on a tree in winter.