Final answer:
The Peloponnesian War was fought predominantly between Athens and Sparta.
Step-by-step explanation:
The Peloponnesian War was fought predominantly between Athens and Sparta.Athens:
Athens was a dominant naval power and the head of the Delian League, an alliance of Greek city-states formed to counter Persian threats. Athens was known for its democratic government, cultural achievements, and a strong navy led by figures like Themistocles and Pericles.
Sparta:Sparta, on the other hand, was a formidable land power with a strong and disciplined army. Spartans were known for their military prowess and adherence to a rigid social and political system. The Spartan-led Peloponnesian League, which included other Peloponnesian city-states, opposed the dominance of Athens.