Syrian rebels attempting to overthrow the Syrian government have been implicated in beheadings too. North America
Mexico
Miguel Hidalgo y Costilla, Ignacio Allende, José Mariano Jiménez and Juan Aldama were tried for treason, executed by firing squad and beheaded during the Mexican independence in 1811. Their heads were on display on the four corners of the Alhóndiga de Granaditas, in Guanajuato. During the Mexican Drug War, some Mexican drug cartels turned to decapitation and beheading of rival cartel members as a method of intimidation. This trend of beheading and publicly displaying the decapitated bodies was started by the Los Zetas, a criminal group composed by former Mexican special forces operators, trained in the infamous US Army School of the Americas, in torture techniques and psychological warfare. United States
The United States government has never employed beheading as a legal method of execution. However, beheading has sometimes been used in mutilations of the dead, particularly of black people like Nat Turner, who led a rebellion against slavery. When caught, he was publicly hanged, flayed, and beheaded. This was a technique used by many enslavers to discourage the "frequent bloody uprisings" that were carried out by "kidnapped Africans".
Chhinnamasta, a Hindu goddess who supposedly decapitates herself and holds her head in her hand. Cleveland Torso Murderer, a serial killer who decapitated some of his victims. Dismemberment
François-Jean de la Barre
Headhunting
List of methods of capital punishment
Mike the Headless Chicken

Notes
References
This article incorporates text from a publication now in the public domain: Chambers, Ephraim, ed. (1728). Cyclopædia, or an Universal Dictionary of Arts and Sciences (1st ed.). James and John Knapton, et al. {{cite encyclopedia}}: Missing or empty |title= (help)

External links

 Media related to Decapitation at Wikimedia Commons

Crime Library
CapitalPunishmentUK.org