1911 Encyclopædia Britannica, Volume 26… (1911)
“ In 424 B.C. the contingent which the Thespians had been compelled to furnish sustained heavy losses at Delium, and in the next year the Thebans took advantage of this temporary enfeeblement to accuse their neighbours of friendship towards Athens and to dismantle their walls. In 414 they interfered again to suppress a democratic rising. In the Corinthian war Thespiae sided with Sparta, and between 379 and 372 repeatedly served the Spartans as a base against Thebes. ”
