Completar a frase: O aumento paralelo de Atenas como poder significativo en Grecia condujo a fricciones entre ella y Esparta y dos conflictos a gran escala (la Primera y Segunda Guerra del Peloponeso), que devastaron a Grecia. Spartans suffered several defeats during these wars, including, for the first time, the surrender of an entire Spartan unit at Sphacteria in 425 BC. ️<unk>️<unk>️<unk>️<unk>️ Under its admiral Lysander, the Persian-funded Peloponnesian fleet captured the Athenian alliance cities, and a decisive naval victory at
<unk> <unk> <unk> <unk> ️<unk>️<unk>️<unk>️<unk>️<unk>