Alcatraz Citadel having some 111 cannons encircling the island at peak, and was also used as a war camp. During the Civil War, the defense establishment at Alcatraz Citadel had the onerous task to defuse the possibility of any local war between the Union and Confederate supporters who were both part of the population of California, and to protect San Francisco. Ammunition in the form of 10,000 muskets and 150,000 cartridges was supplied to the fort, which made the Fort Alcatraz and the island most impregnable and thus leaving any plans of the Confederate soldiers of taking control of the San Francisco
Battle of Alcatraz cellblock. Joe Cretzer was a west coast gangster and member of the Cretzer-Kyle Gang. In 1940 he was sentenced to 25 years for murder. After two escape attempts in the first months of his incarceration, one of which resulted in another murder charge, he was transferred to Alcatraz. In May 1941, Cretzer, Shockley and two other convicts made an escape attempt from one of the prison's workshops. Carnes was the youngest prisoner to reside at Alcatraz, having been convicted of murder in 1943 at the age of 16. He made a number of escape attempts and by 1946, when he