In the Peloponnesian War the Tegeatae were the firm allies of the Spartans, to whom they remained faithful both on account of their possessing an aristocratical constitution, and from their jealousy of the neighbouring democratical city of Mantineia, with which they were frequently at war. Thus the Tegeatae not only refused to join the Argives in the alliance formed against Sparta in 421 BCE, but they accompanied the Lacedaemonians in their expedition against Argos in 418 BCE. They also fought on the side of the Spartans in the Corinthian War, 394 BCE. The Temple of Athena Alea burned in 394 BCE and was magnificently rebuilt, to designs by Scopas of Paros, with reliefs of the Calydonian boar hunt in the main pediment. After the Battle of Leuctra (371 BCE), however, the Spartan party in Tegea was expelled, and the city joined the other Arcadian towns in the foundation of Megalopolis and in the formation of the Arcadian League. When Mantineia a few years afterwards quarrelled with the supreme Arcadian government, and formed an alliance with its old enemy Sparta, Tegea remained faithful to the new confederacy, and fought under Epaminondas against the Spartans at the great Battle of Mantineia, 362 BCE.