Americans worried because (A) any missile launched form Cuba could hit the U.S. within minutes.
Stalin wanted the US and Great Britain to open a second front in France because it would divide the German military. During the time of this statement, Germany's only real military threat came from the Soviet Union. With this in mind, Hitler had the ability to put a huge number of troops on the Soviet Union/German border.
However, if the US and Great Britain planned an invasion through France, that means Hitler would have to move hundreds of thousands, maybe even millions, of troops to France. France, in relation to the Soviet Union, was over 1,000 miles away.
Forcing Germany to fight this two front war would decrease their chance of success.
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Answer:
Rivers and Oceans provided possiblities for trade, transportation, food, and a growing economy.
Explanation:
Because of the Rivers and Oceans teleporting goods from one place to another was a lot cheaper and effecient. On top of this, there was a supply of food with the ability to catch underwater sea life (like fish). This helped spread Europe and its economy significantly.