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
Spartan army peltasts became a much more common sight on the Greek battlefield and themselves became more heavily armed. In response to Iphicrates' victory over Sparta in 392 BC, Spartan hoplites started abandoning body armour and eventually wore almost no armour apart from a shield, leg greaves, bracelets, helmet and a robe. In later periods Spartans did start to readopt armour, but on a much lesser scale than during the Archaic period. Finally during 227 BC, Cleomenes' reforms introduced updated equipment to Sparta, including the Macedonian "sarissa" (pike). However pike-men armed with the "sarissa" never outnumbered troops equipped in the hoplite style.