At this point Nicomedes led his army south into Bœotia. Several factors may have influenced his decision to make this move. First, secret negotiations had been underway with a party at Athens which was willing to betray the city to the Spartans in order to overthrow the democracy. Furthermore, Donald Kagan has suggested that Nicomedes had been in contact with the government of Thebes and planned to unify Boeotia under Theban leadership; which, upon his arrival, he seems to have done.