Ancient Macedonian army at 4,500, asserting it was closer to 5,100 horsemen. The army led by Alexander the Great into the Persian Empire included Greek heavy infantry in the form of allied contingents provided by the League of Corinth and hired mercenaries. These infantrymen would have been equipped as hoplites with the traditional hoplite panoply consisting of a thrusting spear ("doru"), bronze-faced "hoplon" shield and body armour. In appearance, they would have been almost identical to the hypaspists. In battle, the Greek hoplites had a less active role than the Macedonian phalangites and hypaspists. At Gaugamela, the Greek infantry formed the defensive rear
Thracian warfare (plus the onset of winter) meant that this army only held together for about six weeks and any Thracian conquests were ephemeral. The Sapaeans ruled Thrace after the Odrysians until its incorporation to the Roman Empire as a province. Thrace became a Client state of Rome at 11 BC and was annexed at 46 AD. Thrace had the potential to muster a huge number of troops though this rarely occurred. By tradition, Thracians honored warriors and, according to Herodotus, despised all other occupations. The Thracians fought as peltasts using javelins and crescent or round wicker shields called "peltes". Missile weapons