Editing Alcatraz (section)

==Military History==
The earliest recorded owner of the island of Alcatraz is one Julian Workman, to whom it was given by Mexican governor Pio Pico in June 1846 with the understanding that the former would build a lighthouse on it. Julian Workman is the baptismal name of William Workman, co-owner of Rancho La Puente and personal friend of Pio Pico. Later that same year John C. Fremont bought the island for $5000 in the name of the United States government, who subsequently wrested control from Fremont after a legal battle. 

Following the acquisition of California by the United States as a result of the Treaty of Guadalupe Hidalgo (1848) which ended the Mexican-American War, and the onset of the California Gold Rush the following year, the U.S. Army began studying the suitability of Alcatraz Island for the positioning of coastal batteries to protect the approaches to San Francisco Bay. In 1853, under the direction of Zealous B. Tower, the Corps of Engineers began fortifying the island, work which continued until 1858. The island's first garrison, numbering about 200 soldiers, arrived at the end of that year. When the American Civil War broke out in 1861 the island mounted 85 cannon (increased to 105 by 1866) in casemates around its perimeter, though the small size of the garrison meant only a fraction of the guns could be used at one time. Alcatraz never fired its guns in anger, though during the war it was used to imprison Confederate sympathizers on the west coast.

Following the war in 1866 the army determined that the fortifications and guns were being rapidly rendered obsolete by advances in military technology. Modernization efforts, including an ambitious plan to level the entire island and construct shell-proof underground magazines and tunnels, were undertaken between 1870 and 1876 but never completed (the so called "parade ground" on the southern tip of the island represents the extent of the flattening effort). Instead the army switched the focus of its plans for Alcatraz from coastal defense to detention, a task for which it was well suited because of its isolation. In 1867 a brick jailhouse was built (previously inmates had been kept in the basement of the guardhouse), and in 1868 Alcatraz was officially designated a long-term detention facility for military prisoners. Among those incarcerated at Alcatraz were some Hopi Native American men in the 1870s.

On March 21, 1907, Alcatraz was officially designated as the Western US Military Prison. 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. In order 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 its defensive potential. The first floor was then incorporated as a basement to the new cell block, giving rise to the popular legend of "dungeons" below the main cell block.

During the First World War the prison held conscientious objectors, including Philip Grosser, who wrote a pamphlet entitled 'Uncle Sam's Devil's Island' about his experiences.