The men so equipped were divided into six regiments of cavalry and infantry. The officers of each citizen regiment comprise one colonel, four captains, eight first lieutenants and sixteen second lieutenants. These regiments at the word of command form sections sometimes (two), sometimes three, and sometimes six abreast. ― translation from: Edgar Cardew Marchant, Xenophon in Seven Volumes, volume VII: Scripta Minora (1925), Constitution of the Lacedaemonians, chapter xi, § 4
362–354 BC, Xenophon, Ἑλληνικά in Xenophontis Opera Omnia, volume I (1900), Ἑλληνικῶν Β, chapter iv, § 31:
Then, sending ambassadors to the men in Piraeus, Pausanias bade them disperse to their homes; and when they refused to obey, he attacked them, at least so far as to raise the war-cry, in order that it might not be evident that he felt kindly toward them. And when he had retired without accomplishing anything by his attack, on the next day he took two regiments of the Lacedaemonians and three tribes of the Athenian cavalry and proceeded along the shore to the Still Harbour, looking to see where Piraeus could best be shut off by a wall. ― translation from: Carleton Lewis Brownson, Xenophon in Seven Volumes, volume I: Hellenica I–IV (1918), book II, chapter iv, § 31