What are the allies and enemies of ancient Persia?

Ancient Persia, particularly during the Achaemenid Empire, had various allies and enemies. Key allies included cities and regions that benefited from Persian protection and trade, such as the Ionian city-states at times. Enemies included Greece, especially during the Greco-Persian Wars, where notable adversaries like Athens and Sparta emerged. Additionally, the Persian Empire faced challenges from nomadic tribes and neighboring powers like Egypt and Babylon at different points in its history.