William Sloan Tough was a member of the irregular or guerrilla forces called the Kansas Red Legs. The Kansas Red Legs fought on the Kansas-Missouri Border during the American Civil War in support of the Union.
- Gilmore, Donald L.. "Civil War on the Missouri-Kansas Border". http://www.moksbwn.net/Gilmore2.html. Retrieved 16 June 2009.
- Linberg, Kip; Matt Matthews (May 1, 2002). "Better off in Hell: The Evolution of the Kansas Red Legs". North and South. http://www.kchistory.org/cdm4/item_viewer.php?CISOROOT=/Local&CISOPTR=19285&CISOBOX=1&REC=1. Retrieved 16 June 2009.
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