Alcatraz Federal Penitentiary Alcatraz Federal Penitentiary The Alcatraz Federal Penitentiary or United States Penitentiary, Alcatraz Island (often just referred to as Alcatraz or The Rock) was a maximum high-security federal prison on Alcatraz Island, off the coast of San Francisco, California, which operated from August 11, 1934, until March 21, 1963. The main prison building was built in 1910–1912 during its time as a United States Army military prison; Alcatraz had been the site of a citadel since the 1860s. The United States Disciplinary Barracks, Pacific Branch on Alcatraz had been acquired by the United States Department of Justice on October 12, 1933,
Occupation of Alcatraz Movement noted from their visit to the occupation that the demonstration garnered national attention, while those involved faced no punitive action. When AIM members seized the Mayflower II on Thanksgiving, 1970, the Occupation of Alcatraz was noted as "the symbol of a newly awakened desire among Indians for unity and authority in a white world." The occupation of Alcatraz Island served as a strong symbol and uniting force for indigenous peoples everywhere because of the importance the island held in their ancestors' lives. Indians traveled to Alcatraz about 10,000 years before the Europeans even entered the Bay area. Over the