History of the Peloponnesian War
Thucydides
Thucydides. History of the Peloponnesian War. Crawley, Richard, translator. London and Toronto: J. M. Dent and Sons Ltd.; New York: E. P. Dutton and Co., 1914.
There were seven companies in the field without counting the Sciritae, who numbered six hundred men: in each company there were four Pentecostyes, and in the Pentecosty four Enomoties. The first rank of the Enomoty was composed of four soldiers: as to the depth, although they had not been all drawn up alike, but as each captain chose, they were generally ranged eight deep; the first rank along the whole line, exclusive of the Sciritae, consisted of four hundred and forty-eight men.
The armies being now on the eve of engaging, each contingent received some words of encouragement from its own commander. The Mantineans were reminded that they were going to fight for their country and to avoid returning to the experience of servitude after having tasted that of empire; the Argives, that they would contend for their ancient supremacy, to regain their once equal share of Peloponnese of which they had been so long deprived, and to punish an enemy and a neighbor for a thousand wrongs; the Athenians, of the glory of gaining the honors of the day with so many and brave allies in arms, and that a victory over the Lacedaemonians in Peloponnese would cement and extend their empire, and would besides preserve Attica from all invasions in future.
These were the incitements addressed to the Argives and their allies. The Lacedaemonians meanwhile, man to man, and with their war-songs in the ranks, exhorted each brave comrade to remember what he had learnt before; well aware that the long training of action was of more saving virtue than any brief verbal exhortation, though never so well delivered.
After this they joined battle, the Argives and their allies advancing with haste and fury, the Lacedaemonians slowly and to the music of many flute-players—a standing institution in their army, that has nothing to do with religion, but is meant to make them advance evenly, stepping in time, without breaking their order, as large armies are apt to do in the moment of engaging.