Final answer:
The Delian League was an alliance led by Athens in ancient Greece. Athens used it to gain control over member states and fund their own projects.
Step-by-step explanation:
Delian League
The Delian League was an alliance formed by several Greek city-states, led by Athens, in the 5th century BCE. It was initially created as a defensive alliance against the Persian Empire, but Athens eventually used it to gain political and economic control over the member states.
Athens used the Delian League to their advantage by gradually transforming it into an Athenian empire. The league's treasury was moved from Delos to Athens, and Athens imposed contributions and tributes on the member states. This allowed them to build a powerful naval fleet and fund ambitious building projects, such as the construction of the Parthenon.
Learn more about Delian League and how Athens used it