Xenophon Hellenica 7.1.22

[22] After this, however, the Thebans remained but a few days and then ¹ returned home, and the others likewise to their several homes. Then the troops sent by Dionysius invaded the territory of Sicyon, and they not only defeated the Sicyonians in battle on the plain and killed about seventy of them, but captured by storm the stronghold of Deras. After these exploits the first supporting force sent out by Dionysius sailed back to Syracuse.
  Up to this time the Thebans and all who had revolted from the Lacedaemonians had been acting and carrying on their campaigns in full accord, under the leadership of the Thebans.