 According to modern estimates based on the order of battle described by Herodotus, the detailed composition of the Achaemenid army consisted in about 40,000 Persian troops on the left of the battle line, facing the Spartans, about 20,000 Bactrians, Indians and Sakae in the centre, facing various Greek states, and about 20,000 Greek allies of the Persians (Macedonians, Thessalians, Beotians, Thebeans), positioned on the right wing facing the Athenians.The cavalry, which also consisted of Persians, Bactrians, Indians and Sakae, would total about 5,000.Herodotus described in detail the dispositions of the two armies