Disease... i would say. the journey over and many sick people. over crowded.
Answer:
It claimed that Native Americans fought against the United States
Explanation:
The Declaration of Independence listed many greivances about Britain. One of them were that they used "savages" (Native Americans) to attack them during the American Revolution
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Heating homes- increase for coal
Textile factories- increase for cotton
Four wheeled automobiles- increase for oil
(I deleted it because I messed up I didn't know there was a comment button until now sorry)