Final answer:
Sparta led the Peloponnesian League, formed by city-states on the Peloponnese peninsula, against the Athenian-led Delian League during the Peloponnesian War. The correct answer is A) Peloponnese.
Step-by-step explanation:
Peloponnesian War:
The Peloponnesian War was a conflict between the Delian League, led by Athens, and the Peloponnesian League, led by Sparta. Sparta led a league of city-states on the Peloponnese to combat the maritime power of the Athenian led Delian League. The correct answer to the question is: A) Peloponnese.
By the late sixth century BCE, Sparta controlled a fertile region and became the most influential state in the Peloponnese. Sparta then organized neighboring city-states into the Peloponnesian League for mutual protection against common enemies, such as Athens. This affiliation was based on shared interests and common defense policies. The growing tension between the Athenian and Spartan spheres of influence eventually led to the outbreak of the Peloponnesian War in 431 BCE.