yes it did.
Persia.
No, the Delian League was formed under the leadership of Athens to continue protecting the Greek cities which had been under Persian control after the Persian invasion of mainland Greece had been repelled.
to protect the Greeks from the Persians
No, Sparta was not part of the Delian League. The Delian League was a coalition of Greek city-states led by Athens, formed in 478 BCE to continue the fight against Persia after the Persian Wars. Sparta, on the other hand, was a member of the Peloponnesian League, which was a rival alliance to the Delian League. The two leagues eventually clashed in the Peloponnesian War.
because their smart
They enabled Athens to establish an empire from the Delian League which it formed to oppose the Persians. This empire became involved in the Peloponnesian War after peace was made by Persia and Athens used the Delian League to promote its own interests against othe Greek cities of the Peloponnesian League. Persia helped the Peloponnesian League to defeat Athens.
because their smart
Sparta led the Peloponnesian League, Athens led the Delian League.
They were brought back under Persian rule, until they were liberated by the Delian League after Persia's defeat in 479 BCE. However they were brought back under Persian control early in the next century when ongoing fighting between Greek city-states meant that the mainland Greeks could no longer shield them.
No, they were defeated by Sparta and it's allies. The Delian League was formed to defend against Persia, and after peace was made with the Persian Empire, it was turned by Athens into an empire of its own. Athens used its resources of the old League to war against the Peloponnesian League led by Sparta.
Delian League, mostly Greek cities of Asia Minor and the Islands, converted to the Athenian empire after peace with Persia. Peloponnesian League led by Sparta, mainly Dorian Greek cities of Peloponnesian peninsula of southern Greece.
Athens ruled the Delian League.