 The changes that occurred between the Persian and the Peloponnesian Wars are not documented, but according to Thucydides, at Mantinea in 418 BC there were 7 "lochoi" present, each subdivided into four "pentekostyes" of 128 men, which were further subdivided into four "enōmotiai" of 32 men, giving a total of 3,584 men for the main Spartan army.By the end of the Peloponnesian War, the structure had evolved further, both to address the shortages in manpower and to create a more flexible system that allowed the Spartans to send smaller detachments on campaign or to garrisons outside their homeland.According to Xenophon, the basic Spartan unit remained the "enōmotia", with 36 men in three files of twelve under an "enōmotarches".