Because the Greek city-states were weak and disorganized to unite after the Peloponnesian War.
The right answer for the question that is being asked and shown above is that: "by delivering his State of the Union addresses in different cities across the nation." <span>one way that Franklin Roosevelt maintained a close connection with the American people </span>by delivering his State of the Union addresses in different cities across the nation<span>
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The US drafted the Marshall Plan to help rebuild Eastern Europe countries.