Towards the month of June (B.C. 418) they marched with their full force, freemen as well as Helots, under king Agis, against Argos. The Tegeans and other Arcadian allies joined them on the march, while their other allies near the Isthmus,—Bœotians, Megarians, Corinthians, Sikyonians, Phliasians, etc., were directed to assemble at Phlius. The number of these latter allies were very considerable, for we hear of five thousand Bœotian hoplites, and two thousand Corinthian: the Bœotians had with them also five thousand light-armed, five hundred horsemen, and five hundred foot-soldiers, who ran alongside of the horsemen. The numbers of the rest, or of Spartans themselves, we do not know; nor probably did Thucydidês himself know: for we find him remarking elsewhere the impenetrable concealment of the Lacedæmonians on all public affairs, in reference to the numbers at the subsequent battle of Mantineia. Such muster of the Lacedæmonian alliance was no secret to the Argeians, who marching first to Mantineia, and there taking up the force of that city as well as three thousand Eleian hoplites who came to join them, met the Lacedæmonians in their march at Methydrium in Arcadia. The two armies being posted on opposite hills, the Argeians had resolved to attack Agis the next day, so as to prevent him from joining his allies at Phlius. But he eluded this separate encounter by decamping in the night, reached Phlius, and operated his junction in safety. We do not hear that there was in the Lacedæmonian army any commander of lochus, who, copying the unreasonable punctilio of Amompharetus before the battle of Platæa, refused to obey the order of retreat before the enemy, to the imminent risk of the whole army. And the fact, that no similar incident occurred now, may be held to prove that the Lacedæmonians had acquired greater familiarity with the exigencies of actual warfare.