Complex sentence: After its success against Athens in the Peloponnesian War, Sparta unsuccessfully sought to take the city from the Persians, but in 334 BC, Tralles surrendered to Alexander the Great without resistance and therefore was not sacked.
Split into simpler sentences: After its success against Athens in the Peloponnesian War, Sparta unsuccessfully sought to take the city from the Persians. In 334 BC, Tralles surrendered to Alexander the Great without resistance and therefore was not sacked.