Alcatraz Island 1906 San Francisco earthquake, civilian prisoners were transferred to Alcatraz for safe confinement. On March 21, 1907, Alcatraz was officially designated as the Western U.S. Military Prison, later Pacific Branch, U.S. Disciplinary Barracks, 1915. In 1909 construction began on the huge concrete main cell block, designed by Major Reuben Turner, which remains the island's dominant feature. It was completed in 1912. To accommodate the new cell block, the Citadel, a three-story barracks, was demolished down to the first floor, which was actually below ground level. The building had been constructed in an excavated pit (creating a dry "moat") to enhance
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