Shrimpton believes that the apparent indifference of earlier authors was due to the general hatred by other Greeks against the Thebans who had medized (i.e. allied with the Persians) in the second Persian invasion in 480 BC and again in 368 BC. Athenians, in particular, held a special contempt for Thebes due to the latter's actions in the Peloponnesian War; as well as the Thebans' destruction of Plataea in 373 BC, and the invasion of the Athenian-allied Boeotian city of Oropus in 366 BC. Demosthenes records this sentiment very clearly in a disclaimer in his speech "On the Navy" (354 BC): "It is difficult to speak to you about [Thebans], because you have such a hearty dislike of them that you would not care to hear any good of them, even if it were true."