Answer:
Oregon Fever
Step-by-step explanation:
At that time, promoters and propaganda spread the news to the people across the nations that the area surrounding Oregon were filled with unclaimed natural resources and cheap lands.
After hearing this news, many people see this as an opportunity to opened up a business and obtain better a better life. This caused many farmers, miners, and ranchers tried to make heir way to Oregon which located on the northwestern part of United States.