Encouraged by this success, the Greeks descended into the plain, and took up a second position on the right bank of the Asopus. The Lacedæmonians occupied the right wing, the Athenians the left. A curious instance of the want of discipline in the army is afforded by the dispute which arose between the Athenians and the Tegeans as to precedence. The first post of honour, the right wing, was conceded by common consent to the Lacedæmonians; the second part, the left wing, was the matter in dispute. Tegea claimed it on account of various mythical exploits, and on more recent successes achieved in company with Sparta. Athens had also its mythical claims, but it relied on the victory at Marathon. The decision was given in favour of Athens by a general vote of the Lacedæmonian soldiery. The new position taken up by the Greeks was found to be anything but convenient. The army suffered from a scarcity of water; it was unsafe to approach the river banks, for this was commanded by the Persian archers, and consequently the sole supply was a spring, known by the name of Gargaphia, which was close to the Lacedæmonian position. Mardonius shifted his line of battle a little to the west, so as to front the new Greek position. His picked native troops, the Persians and the Sacæ (Turkomans) were posted, not in the centre, the post of honour in an Asiatic army, as we have seen more than once before, but on the left wing, where they would face the Spartans; to the Theban contingent was allotted a place on the right where they were opposed to their old enemies of Athens. This was done at the suggestion of the Theban leaders, and the suggestion did credit, as we shall see, to their sagacity.