1. The Peloponnesian War
Athens vs. Sparta

2. Delian League
1. Defensive alliance of Greek city-states to prevent future invasions by the Persians – headed by Athens.

3. Peloponnesian League
1. Formed as a result of resentment toward Athenian power – headed by Sparta.

4. The Spark
1. Athens and Corinth (a member of the Peloponnesian League) have a dispute that flares into open conflict.

5. The War Athens dominates at sea Sparta dominates on land
Fighting lasts for 27 years
Sparta eventually secures a surrender from Athens

6. The Effects Athens loses its empire, navy, and democratic government.
Greece is weak and unstable making it an easy target for Phillip II of Macedonia.