Answer:
For the Second Athenian Confederacy (378-7 BC), a revival of the Delian League, the enemy was Sparta. It was created as a protection against Spartan aggression. It was a maritime self-defense league led by Athens. The Delian League was finally broken up by the capture of Athens by Sparta in 404 BC.
The northern part of the United States won when Robert E. Lee surrendered to Ulysses S. Grant in 1864
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