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Outbreaks of violence
opium
Relatively poor, rural Europeans immigrated to industrial cities of the United States.
it helped them develop the oil industry
Antarctica, in the 1800s, was the last continent to be discovered by Europeans.
End of the 1800s.
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rushed to Oregan and California
End of the 1800s.
Outbreaks of violence
Trade networks kept Europeans from controlling the sources of trade items such as gold and ivory.
opium
europeans
All of the above
Onions have been grown for thousands of years.
In the area to trade