<span>They started because the Persian Empire expanded into Ionia where there were several Greek colonies. The colonists sent back to Greece for help. The Athenians sent a few ships to help the colonists, but the cities were taken any way. To put the mainland Greeks in their place, the Persians sent a small force to punish the Greeks. So begins the battle of Marathon. </span>
Answer:
Other countries were turning to communism like Russia and the U.S. didn't want other countries to become communist.
Answer The fear of being alone
Explanation: