This sentiment changed in 339 BC, when Thebes abruptly severed its alliance with Philip II (after being convinced by a speech from Demosthenes) and joined the Athenian-led Pan-Hellenic alliance against Macedonia, with the result being the annihilation of the Sacred Band in Chaeronea and the destruction of the city of Thebes itself in 335 BC by the Macedonians. In light of these actions, Athenians eventually changed their opinions on Thebes, now regarding it in a sympathetic light as a fallen ally. It was during this period that much of the accounts favorable to Thebans were at last written. Works by authors like Anaximenes of Lampsacus, Aristoxenus, Callisthenes, Daimachus, Dinarchus, and Ephorus are believed to have been written between 330 and 310 BC. Except for Dinarchus, almost all of them have been lost to history or survive only in fragments. Among them are Ephorus and Callisthenes who were contemporaries of the Theban hegemony and the Sacred Band. The works of the latter two, however, survived long enough for later authors like Plutarch, Diodorus, and Polyaenus to base their works on.