Peltast fighting used by peltasts originated in Thrace and the first Greek peltasts were recruited from the Greek cities of the Thracian coast. They are generally depicted on vases and in other images as wearing the typical Thracian costume, which includes the distinctive Phrygian cap made of fox-skin and with ear flaps. They also usually wear a patterned tunic, fawnskin boots and a long cloak, called a zeira, decorated with a bright, geometric, pattern. However, many mercenary peltasts were probably recruited in Greece. Some vases have also been found showing hoplites (men wearing Corinthian helmets, greaves and cuirasses, holding hoplite spears)
Battle of Gaugamela weapon of the Achaemenid army historically was the bow and arrow, and javelin. Alexander commanded Greek forces from his kingdom of Macedon and the Hellenic League, along with Greek mercenaries and levies from the Paeonian and Thracian tributary peoples. According to Arrian, the most reliable historian of Alexander (who is believed to be relying on the work of the eyewitness Ptolemy), his forces numbered 7,000 cavalry and 40,000 infantry. Most historians agree that the Macedonian army consisted of 31,000 heavy infantry, including mercenaries and hoplites from other allied Greek states in reserve, with an additional 9,000 light infantry consisting mainly