Europeans carried a hidden enemy to the Indians: new diseases. Native peoples of America had no immunity to the diseases that European explorers and colonists brought with them. Diseases such as smallpox, influenza, measles, and even chicken pox proved deadly to American Indians.
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b.the agriculter adjustment act
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Answer:
The Great Plains has good farmland, As the land there is highly fertile & high in humus content.
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A simple diffusion works best for this
Answer: Germanic tribes they had no written laws, they were mostly farmers and were governed by kings elected by tribal council. A king for each tribe made it more difficult to unify the tribes.
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