The Occupation of Alcatraz (November 20, 1969 June 11, 1971) was a 19-month long protest when 89 Native Americans and their supporters occupied Alcatraz Island. The protest was led by Richard Oakes, LaNada Means, and others, while John Trudell served as spokesman. The group lived on the island together until the protest was forcibly ended by the U.S. government.

The protest group chose the name Indians of All Tribes (IOAT) for themselves. IOAT claimed that, under the Treaty of Fort Laramie between the U.S. and the Lakota tribe, all retired, abandoned, or out-of-use federal land was to be returned to the Indians who once occupied it. As Alcatraz penitentiary had been closed on March 21, 1963, and the island had been declared surplus federal property in 1964, a number of Red Power activists felt that the island qualified for a reclamation by Indians.

The Occupation of Alcatraz had a brief effect on federal Indian Termination policies and established a precedent for Indian activism. Oakes was shot to death in 1972, and the American Indian Movement was later targeted by the federal government and the FBI in COINTELPRO operations.

The Indigenous peoples of the Americas are the inhabitants of the Americas before the arrival of the European settlers in the 15th century, and the ethnic groups who now identify themselves with those peoples.

Many Indigenous peoples of the Americas were traditionally hunter-gatherers and many, especially in the Amazon basin, still are, but many groups practiced aquaculture and agriculture. While some societies depended heavily on agriculture, others practiced a mix of farming, hunting, and gathering. In some regions, the Indigenous peoples created monumental architecture, large-scale organized cities, city-states, chiefdoms, states, kingdoms, republics, confederacies, and empires. Some had varying degrees of knowledge of engineering, architecture, mathematics, astronomy, writing, physics, medicine, planting and irrigation, geology, mining, metallurgy, sculpture, and goldsmithing.

Many parts of the Americas are still populated by Indigenous peoples; some countries have sizeable populations, especially Bolivia, Canada, Chile, Ecuador, Guatemala, Mexico, Peru and the United States. At least a thousand different Indigenous languages are spoken in the Americas. Some, such as the Quechuan languages, Aymara, Guaraní, Mayan languages, and Nahuatl, count their speakers in the millions. Many also maintain aspects of Indigenous cultural practices to varying degrees, including religion, social organization, and subsistence practices. Like most cultures, over time, cultures specific to many Indigenous peoples have evolved to incorporate traditional aspects but also cater to modern needs. Some Indigenous peoples still live in relative isolation from Western culture and a few are still counted as uncontacted peoples.