The famous Great Wall of China is considered to be the first line of defense and warning and was not even seen as an impenetrable barrier to those nomadic invaders and tribes. The view of the Great Wall was a vast plain of northern China that extends more than 300,000 sq. kilometers to the south.
Moreover, the region was comprised of coastal lowlands, Piedmont tablelands, highlands prairies and enormous mountains extending approximately 3170 miles from east to west. With this massive land mass and wide variations in climate and environmental factors such as unpredictable water currents in rivers, steppes, desert lands and impenetrable ridges, it was truly a first line of defense of China.
<span>Social Darwinism is a term used for ideologies which exploited ideas of survival of the fittest.To elitists strong nations were composed of white people who were successful at expanding their empires, and would survive in the struggle for dominance.</span>
Answer:4.The King of Portugal who sent out explorers to map the west coast of Africa.
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ended with the treaty of paris
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