The ancestors of modern Native Americans arrived in what is now the United States at least 15,000 years ago, possibly much earlier, from Asia via Beringia.A vast variety of peoples, societies and cultures subsequently developed.
As most Native American groups had historically preserved their histories by oral traditions and artwork, the first written sources of the conflict were written by Europeans.
Over time, the United States forced a series of treaties and land cessions by the tribes and established reservations for them in many western states. The ways Native Americans refer to themselves vary by region and generation, with many older Native Americans self-identifying as "Indians" or "American Indians", while younger Native Americans often identify as "Indigenous" or "Aboriginal".
The term "Native American" has not traditionally included Native Hawaiians or certain Alaskan Natives, such as Aleut, Yup'ik, or Inuit peoples.
Since the 1960s, Native American self-determination movements have resulted in many changes to the lives of Native Americans, though there are still many contemporary issues faced by Native Americans.
Today, there are over five million Native Americans in the United States.