Results: Messenians capitulate and are allowed to leave the Peloponnesus never to return. Athens retaliates by settling them at Naupactus.

PELOPONNESIAN WAR.—431-404 B. C.

(1) Sparta and Allies vs. (2) Athens and Allies.

a. First Period—431-421 B. C.

Cause: Envy of Sparta and her allies at Athens’ growing power and influence. Discontent among some of the Athenian subject states.

Leaders: (1) Archidamus, Agis, Brasidas; (2) Demosthenes, Cleon, Nicias.

Chief Actions: (1) Invasion of Attica, Plague in Attica, Siege of Platæa, Delium, Amphipolis. (2) Mitylene, Sphacteria.

Results: By the peace of Nicias (421 B. C.) both sides are to restore conquests and prisoners but terms are imperfectly carried out.

b. Second Period or Decelean War—413-404 B. C.