Alcatraz's Civil War Legacy: From Military Fort to Notorious Prison
Alcatraz Island, located in San Francisco Bay, is widely known for its role as a federal prison housing some of America's most notorious criminals. However, its history as a military fort during the Civil War is less well-known. Initially designated as a military reservation by President Millard Fillmore in 1850, Alcatraz was fortified to protect the strategic port of San Francisco following the Mexican-American War and the California Gold Rush. By 1854, it was operational as a military fort, forming part of a defensive network known as the 'Triangle of Defense' alongside Fort Point and Lime Point. During the Civil War, Alcatraz served as a key defensive stronghold and prison for Confederate sympathizers and prisoners of war. Its strategic importance was underscored by its arsenal of 111 cannons and its role in preventing enemy ships from entering San Francisco Bay. 
