It is not an exaggeration to say that the US underwent a "transportation revolution" during this time. Before paved roads occurred, it cost practically the same amount to ship something to Europe as it did to send it on land in the US. Paved roads of course increased economic output but making the transfer of supplies much easier.
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The two events that spurred the need to chart new maritime routes are the following : Europeans developed the economic system of mercantilism and needed reserves of gold and silver ; and Europe witnessed a period that historians refer to as a "dark age."
The Greeks. I cannot recall what they were called then.
Answer: The Indian Remove Act
Explanation: Native Americans lived on the land settlers wanted. President Jackson thought it was impossible for Native Americans to live as independent nations within the borders of the US.