American highlands i think
Answer:on march 7 ,1936 German troops marched into the Rhineland. This action was directly against the Treaty of Versailles which had laid out the terms which the defeated Germany had accepted. This move, in terms of foreign relations, threw the European allies, especially France and Britain, into confusion.
Explanation:
Large seaworthy vessels first appeared in the Mediterranean Sea, but of course it should be noted that they also appeared elsewhere in the world as well.
the answer is the American system promised to help transport crops to northern markets.
