A Native American tribe is a group of indigenous people in the United States who share a common culture, language, and history. Each tribe has its own unique traditions, governance, and social structures. Tribes can vary significantly in size and can be recognized by the federal government or state governments. Many tribes have their own reservations, which are areas of land set aside for their use. Some well-known tribes include the Navajo Nation, the Cherokee Nation, and the Sioux Nation. These tribes often work to preserve their cultural heritage and advocate for their rights and interests in modern society.