Peltast their ranks (to allow the Persian cavalry through) and proceeded to deal blows (with swords) and throw javelins at them as they went through. Xenophon's description makes it clear that these peltasts were armed with swords, as well as javelins, but not with spears. When faced with a charge from the Persian cavalry they opened their ranks and allowed the cavalry through while striking them with swords and hurling javelins at them. They became the main type of Greek mercenary infantry in the 4th century BCE. Their equipment was less expensive than that of traditional hoplites and would have been
Cyrus the Younger his expedition. By dexterous management and large promises, he overcame the misgivings of the Greek troops over the length and danger of the war; a Spartan fleet of thirty-five triremes sent to Cilicia opened the passes of the Amanus into Syria and conveyed to him a Spartan detachment of 700 men under Cheirisophus. The king had only been warned at the last moment by Tissaphernes and gathered an army in haste; Cyrus advanced into Babylonia before he met with an enemy. In October 401 BC, the battle of Cunaxa ensued. Cyrus had 10,400 Greek hoplites (citizen-soldiers), 2,500 peltasts (light infantry),