|John Brown's Army|
The JBA had created a plot to overthrow the U.S. government as they saw it to be overtly corrupt. Sam Fisher, in undertaking what Irving Lambert cited as being "the most dangerous mission of his career", had to infiltrate the JBA Headquarters to destroy it and gain information about its associate terrorist groups. They are named after the 19th century anti-slavery activist John Brown.
The JBA's revolutionary plans slowly unfolded before Sam, as he partook in their many crimes and gained their trust. He became a member of the JBA after helping Jamie Washington escape from Ellsworth Penitentiary after intentionally being placed there by the NSA.