The Spartans become more and more annoyed with Athens’s success and abundant narcissism. As their anger builds up, they decide to attack Athens, in hopes of taking their triumph away from them. The Athenians lose 1/3 of their population due to a devastating plague, but the Spartans become at loss as well after their general, Pericles, dies. A temporary truce is put in place in 421 B.C., but the war is resumed in 415 B.C. when Athens invades Syracuse, a close Spartan ally. The Spartans arrive at Syracuse and destroy the Athenian army who then surrenders to Sparta. In effect, Athensa loses its power and wealth and the Delian League is replaced.