Arya.
The Persians attacked the Greeks in the Persian war
The Ionian Revolt.
Greco-Persian Wars .
Segeral city states formed an alliance after the Persian wars to make it possible to combat the Persians.
The Greeks fought the Persians in the Greco-Persian Wars
The Persian Wars pitted the Persians against the mainland Greeks. Eventually, the Greeks won after defeating the Persians by land and sea in the Second Persian War. Later, the Macedonian Geeks, under Alexander the Great, invaded and conquered the Persian Empire.
Some sided with the Persians, others combined to repel the Persian invasion.
Well yes - they were on one side, the Persians on the other.
Their infantry warriors wore metal armour, which the Persians did not.
The Persian Wars where the Persians fought the Greeks (Greco-Persian Wars)occurred between 499 BC and lasted until 449 BC .
They were so important because it led to the destruction of the Persian Empire.
Thermopylae was a very minor event in the 50-year Persian Wars. It failed to have any influence on the wars, and only later became symbolic of courage.