 Secondly, to re-train the army in this manner would allow it to perform better in the Seleucid empire's eastern satrapies beyond the river Tigris, which were of high importance to Seleucid rulers from Antiochus III through to Demetrius II.Thirdly, changing their equipment and training would add to their fighting capability and efficiency, hence making the army more maneuverable.It has been suggested that the fact that these 5,000 men were marching at the head of the army was meant to show Antiochus IV's intention of reforming the entire Seleucid army along Roman lines, though whether or not this complete reform actually took place is unknown.