Jefferson City was chosen as the site of a state prison. This prison, named the Missouri State Penitentiary, opened in 1836. This prison was home to multiple infamous Americans, including former heavyweight champion Sonny Liston, assassin James Earl Ray, and bank robber Pretty Boy Floyd. During the Civil War, Jefferson City was occupied by Union troops and the elected state legislature was driven from Jefferson City by Union General Nathaniel Lyon. Some of the legislators later reconvened in Neosho and passed an ordinance of secession. Missouri was claimed by both the Confederacy and the Union, as was neighboring state Kentucky. Missourians were strongly divided and many people in the state—especially in St. Louis—supported the Union, while other areas (such as Missouri's Little Dixie) were strongly pro-Confederate along the Missouri River between Jefferson City and Kansas City.