I am not sure what exactly you want to receive as an answer but Ill give 2 examples.
After the rise of the Third Reich Jewish people were forced to migrate from Germany to neighboring countries and a lot of them in fact fled to United States including the famous scientist Albert Einstein.
The other example is the forced migration of Native Americans during the settlement and colonization by the American Colonies as they were trying to go farther down the continent.
Byzantine empire fight for Roman empire
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<u><em>D) The shift in tactics of the SNCC under Stokely Carmicheal</em></u>
Answer:
Ineffective rulers, corrupt officials, and a government without money, higher taxes and bad harvests.
