The political stability of Sparta also meant that no significant changes in the constitution were made. The oligarchic elements of Sparta became even stronger, especially after the influx of gold and silver from the victories in the Persian Wars. In addition, Athens, after the Persian Wars, was becoming the hegemonic power in the Greek world and disagreements between Sparta and Athens over supremacy emerged. These led to a series of armed conflicts known as the Peloponnesian War, with Sparta prevailing in the end. However, the war exhausted both poleis and Sparta was in turn humbled by Thebes at the Battle of Leuctra in 371 BCE. It was all brought to an end a few years later, when Philip II of Macedon crushed what remained of the power of the factional city-states to his South.