Granicus without them. In total, Alexander's army numbered 12,000 heavy infantry, 1,000 light infantry and 5,100 cavalry for a total of 18,100 men. From the right wing to the left, Alexander placed seven of his eight squadrons of Companion cavalry, along with the archers and Agrianians, under the command of Philotas. Because the Agrianians usually fought interspersed with the Companion cavalry, they were most likely placed in front of them. The prodromoi, the Paeonian cavalry and the eighth squadron of the Companion cavalry under Socrates were posted next to them. Overall command of these three cavalry units was held by Amyntas, son of Arrhabaeus. After them came the hypaspists commanded by Nicanor, which guarded the right flank of the Foot Companions next to them. There were six units of Foot Companions: led by Perdiccas, Coenus, Craterus, Amyntas the son of Andromenes, Philip the son of Amyntas, and Meleager. To the left of Meleager's Foot Companions were the Thracian cavalry under the command of Agathon. Next to them were stationed the allied Greek cavalry under Philip, son of Menelaus. At the extreme left were the Thessalian cavalry under the command of Calas. Alexander placed Parmenion in overall command of the Foot Companions of Philip and Meleager, and the cavalry on the left wing. Alexander commanded the remainder of the army on the right wing. The Greek allied and mercenary infantry, which were part of the invasion force, were not used during the battle. Persian army For the Persian army Arrian gives a number of almost 20,000 infantry, all Greek mercenaries, and 20,000 cavalry. Diodorus gives a figure of 10,000 cavalry and 100,000 infantry. Justin gives an even higher number of 600,000 men in total for the Persians. The historian Azar Gat explains that although the Persian Empire and its armies were large, the size of its armies were wildly exaggerated in the Greek sources. Gat adds that this was an "invariable" habit of pre-modern writers, as they both lacked precise information and were patriotically biased. N. G. L. Hammond accepts the Persian troop numbers given by Arrian. A. M. Devine and Krzysztof Nawotka regard the numbers given by Justin and the number for infantry given by Diodorus to be fantastical because such a large army would have been a logistical impossibility. Both historians consider the figure of 10,000 cavalry given by Diodorus to be more plausible. J. F. C. Fuller also