Because the US had a great geographical location which shileded them from immediate contact with any military force. This was one thing, another thing was that they were lending money to the different European nations which they had to return after some time. All of this enabled the US to catapult itself and become a world power.
The terrain is one thing they study, for example, if it is woody, or a plain, or rocky, or if it has mountains, etc.
they also study the plants, animals, etc and how they survive in the conditions
hope this helps
Morpheus the god, <span>brought messages and prophesies from the gods to mortals through the medium of dreams</span>
His strategy Blitzkreig.
Literally meaning a lightening war, Hitler used this strategy in Poland. It was based on a co-ordinated rapid attack spearheaded by tanks and infantry along with an aerial attack by the Luftwaffe.
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