I think it is the political divide between Western and Eastern Europe. Here's a picture.
Answer:
McAlester, Oklahoma
-called the McAlester Ammunition Plant
Answer:
It affected the Americans positively long terms, but negatively in the early times of the exchange.
Explanation:
The Columbian Exchange greatly affected America, bringing destructive diseases that depopulated the Americans but did distribute a wide variety of new crops and livestock throughout the American farm industry. In the long term, this rather increased the human population but still very profoundly affected the Americans.
Of all the Ethnic groups in Russia and the Eurasian republics, the B) Slavs are most numerous.
the person that became president was Calvin Coolidge