Alcatraz Island later invalidated the sale and paid Frémont nothing. Frémont and his heirs sued for compensation during protracted but unsuccessful legal battles that extended into the 1890s. 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 United States Army Corps of
Birdman of Alcatraz (film) Birdman of Alcatraz (film) Birdman of Alcatraz is a 1962 American biographical drama film starring Burt Lancaster and directed by John Frankenheimer. It is a largely fictionalized version of the life of Robert Stroud, a federal prison inmate known as the "Birdman of Alcatraz" because of his life with birds. In spite of the title, much of the action is set at Leavenworth Prison, where Stroud was jailed with his birds. When moved to Alcatraz he was not allowed to keep any pets. The film was adapted by Guy Trosper from the 1955 book by Thomas E. Gaddis. It was