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The migration theory is the belief that during the ice age people from the areas of mongolia, china, russia, etc...migrated to the northeast and traveled over the land bridge of the Bering Strait (the land bridge being exposed because the water levels had dropped due to a ton of water being frozen) and proceeded to migrate down into Canada and further south into North America, Mexico and then to South America. They did all of this in search of a warmer climate and new food sources, and that is a theory on how the Native Americans, Aztecs, Incans, Mayans, Olmecs, etc...all came to be in the North and South America's.
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the two countries opened up a second front against the german army in north africa.
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The spread of Enlightenment philosophers' ideas sparked changes in governments and society throughout Europe. Encouraged by ideas such as natural law and social contracts, people challenged the structure of governments and society in existence since the Middle Ages.
