Xenophon Hellenica 4.4.9

[9] The walls, however, are a long distance from each other; his troops, in consequence, when they formed in line for battle, thought themselves to be few in number, and therefore made a stockade and as good a trench as they could in front of them, to protect them until their allies should come to their aid. Besides, there was a garrison of Thebans in their rear, at the port.
  Now the day after the night on which they entered they passed without a battle; but on the following day came the Argives, hurrying with all speed to the rescue; and finding the Lacedaemonians stationed on the right of their own line, the Sicyonians next to them, and the Corinthian exiles, about one hundred and fifty in number, by the eastern wall, the enemy formed in line against them with the mercenaries under Iphicrates close to the eastern wall, and next to them the Argives; while the Corinthians from the city occupied their left wing.