Janko asks how can it be that a supposedly Greek army was fighting against thousands of Greeks in the Persian army? He quotes the classical scholar Aubrey de Selincourt translating Arrian about the battle of Issus: "When Darius heard that Alexander was coming to attack, he sent another thirty thousand mountain-brigade soldiers and twenty thousand light foot soldiers over the river Pindarus... The distribution of his army was like this: The best of his very heavy foot soldier brigades were his thirty thousand Greek professional soldiers, who were immediately opposite the Macedonian foot soldier brigade, and sixty thousand soldiers of the Persian heavy foot soldiers brigade, known as ‘Cadaki', who were distributed to the side and who were there to give them help..."