The Persian Wars started when Emperor Darius I began an invasion of Greece. What caused Darius to decide to attack Greece?

Question

A.
Greek leaders had declared independence from the Persian Empire.
B.
Greek city-states had supported rebellions in the Persian Empire.
C.
Greek armies had attacked and taken over land that belonged to Persia.
D.
Greek pirates had raided Persia's merchant ships and coastal towns.

Answer 1

The correct answer is B. Greek city-states had supported rebellions in the Persian Empire.

Darius I decided to attack Greece partly because some Greek city-states, particularly Athens, had supported the Ionian Revolt against Persian rule. This support was seen as a direct challenge to Persian authority, prompting Darius to seek revenge and to prevent further Greek interference in Persian affairs.