What role did Athens play in the delian
league?

The Delian League (or Athenian League) was an alliance of Greek city-states led by Athens and formed in 478 BCE to liberate eastern Greek cities from Persian rule and as a defence to possible revenge attacks from Persia following the Greek victories at Marathon, Salamis, and Plataea in the early 5th century BCE.

john maynrd keynes developed new economic respose to the                           ( b. great depression if the 1930's)