This was actually held in 1843 when the first large-scale migration to oregon country take place, and therefore, there was large amoint, just about thousands of pioneer's ready to take on action. They made sure that this scale would decrease.
Hello there!
The need for new trade routes to the East, the desire to spread Christianity and <em>competition between European countries </em>prompted the start of European exploration in the 15th and 16th centuries.
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