Maximilian Otto Bismarck Caspari and Ernest Arthur Gardner, 1911 Encyclopædia Britannica, Volume 26… (1911)
“ In 423 they broke out into open war with the Mantineians, and when the latter rebelled against Sparta and allied themselves with Argos and Athens, the Tegeans stood firmly by Sparta's side: in the decisive battle of Mantineia (418) their troops hadalarge share in the overthrow of the coalition. During the early 4th century before Christ Tegea continued to support Sparta against the Mantineians and other malcontents. ”
