Athens and the Delian League fought a brutaly ugly and bloody Greek civil war With Sparta and the Peloponnesian League. People seem to prefer one power over the other but both have their contradictions against their stereotypes. Athens was know for culture and sophistication yet they had a powerfull millitary and often used military force or coercian on smaller citys to force them into to a subserviant role in their Alliance. And Sparta is know for brutal militaristic society yet they beleived in Greek autonomy and often defended the weaker city states when in need. They also didn't beleive in expanding outside Greece and wontan conquest. Athens gave us theater philosophy and ideas about democracy and self rule free of kings and dictators.
But how about this legendary conflict. Who would you have thrown in your lot with?