Final answer:
The subject of this question is History, specifically about the Persian War and its significance in Greek history.
Step-by-step explanation:
The subject of this question is History.
During the Persian War, the Greek city-states, including Athens and Sparta, fought against the Persian Empire. This conflict is famous because it pitted an underdog, Greece, against a powerful empire, Persia. The Greeks eventually emerged victorious, which led to a period of confidence and cultural and intellectual achievements known as the Classical Age. The Persian War is a significant event in Greek history and is studied in the field of history.