Answer:
During the war, the United States was supplying goods to the nations opposing Germany. This led to Germany conducting unrestricted submarine warfare where they would perceive any convoy supplying their enemies as enemy ships. This meant that they started sinking ships of neutral US and angering the nation.
It was mainly the construction of railroads that helped cities thrive in the 1800s, while it was mostly the invention of the television that <span>had the most significant impact on the rise of mass entertainment in the late nineteenth century</span>.
The Mississippi was used for transportation and their were ports along it before the LA purchase
In the Battle of Waterloo in 1815.