The two types of farm owning developed slavery because the owners of them were allowed to have slaves. The encomienda system was based on the idea that conquerors should have slaves to work for them, and it similarly applied to sugar colonies that had slaves on them. They were responsible for a lot of trafficking of slaves from Africa.
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Japan's only chance was the element of surprise and to destroy America's navy as quickly as possible. Japan wanted to move into the Dutch East Indies and Malaya to conquer territories that could provide important natural resources such as oil and rubber.
War between Japan and the United States had been a possibility that each nation's military forces planned for in the 1920s, though real tension did not begin until the 1931 invasion of Manchuria by Japan.
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The group that benefited the most from gaining independence from Mexico are the Tejanos who were the former Americans and has now become the American citizens and had claimed for the American rights and privileges.