The correct answer to this open question is the following.
Name a group that exists today that could be compared to the Delian League.
The name would be DUG
What do the letters in their names mean?
DUG. Defending the Unity of Greece.
Let's remember that the Delian League was founded in 478 BC in ancient Greece, and was led by the powerful city-state of Athens. It was a group of city-states that decided to form the league to cooperate and defend their territories from the Persian invasions.
This new League, DUG, would not be as dominant and controller of its members, as was the case of Atehnd with the Delian League. In that time, Athens exerted too much power and pressure over its members that it caused a separation of city-states and later, the Peloponnesian Wars.