Which Plains tribes most resisted expansion?

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There are several websites in this group of search results that should help.

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The Plains tribes that most resisted expansion during the European settlement of North America include the Sioux (Lakota, Dakota, and Nakota), Cheyenne, Comanche, and Apache. These tribes fiercely defended their territories and way of life against encroachment by settlers and the US government.

To learn more about the Plains tribes that resisted expansion, you can conduct a search using an internet search engine like Google. Simply enter keywords such as "Plains tribes resistance to expansion" or "Plains tribes and European settlement" into the search bar. This will generate a list of relevant websites and resources that provide in-depth information on the topic.

Remember to critically evaluate the sources you come across and prioritize reputable and academic sources such as university websites, government archives, and reputable historical journals.