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- Ironically, while built to guard against a foreign invasion, Alcatraz's most important period militarily was during the Civil War, 1861-1865. Since it was the only completed fort in the bay, it was vital in protecting San Francisco from Confederate raiders.
www.nps.gov › alca › learnFortress Alcatraz - Alcatraz Island (U.S. National Park Service)
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Fort Alcatraz was a United States Army coastal fortification on Alcatraz Island near the mouth of San Francisco Bay in California, part of the Third System of fixed fortifications, although very different from most other Third System works.
Feb 27, 2015 · Alcatraz troops are sent to San Francisco to preserve peace and prevent rioting after President Lincoln's assassination. Alcatraz cannons fire the official mourning for the dead president. 1870 Major George Mendell designs plans for earthwork defenses on Alcatraz. 1876 Centennial Great Sham Battle proves Alcatraz defenses are no longer adequate ...
Nov 30, 2022 · Alcatraz's Military History 1850-1933. Fortress Alcatraz. Alcatraz's notoriety as a penitentiary overshadows its earlier, and longer, use by the Army. Surprisingly, this small island once was the most powerful fort west of the Mississippi River. San Francisco Bay is the largest natural harbor on America's West Coast.
Mar 4, 2019 · Military pursuits on Alcatraz were abandoned shortly thereafter. When the island’s prison was erected around the turn of the 20th century, little physical evidence of its former...
Jan 12, 2024 · Island of Incarceration, Island of Freedom. Alcatraz reveals stories of American incarceration, justice, and our common humanity. This small island was once a fort, a military prison, and a maximum security federal penitentiary.
The Army also made plans to install more than 100 cannons on the island, making Alcatraz the most heavily fortified military site on the West Coast. Together with Fort Point and Lime Point, Alcatraz formed a "triangle of defense" designed to protect the entrance to the bay.
Oct 27, 2009 · By the late 1850s, the U.S. Army had begun holding military prisoners at Alcatraz. Isolated from the mainland by the cold, strong waters of San Francisco Bay, the island was deemed an ideal...
