Why did Greece manage to resist the Persian power?

The Persian Empire was very powerful at that time. She brought a huge army to Greece. In fact, the Greeks had no chance of winning. But the Greeks rallied and fought bravely against the enemy. Thus, they were able to turn the tide of the war in their favor. The Greeks managed to inflict a number of serious defeats on the Persians. After the victory in Plataea in 79 BC, the war was moved to Asia Minor.

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