"Sovereign citizen ideology is modeled on Posse Comitatus."
https://www.motherjones.com/politics/2016/07/gavin-long-sovereign-citizen-posse-comitatus-patriot-militias/
"Common Law"
"“Posse Comitatus"
https://amuedge.com/signs-of-sovereign-citizens-and-how-officers-should-respond/
"Posse comitatus means "the power or force of the county." The term refers to a doctrine of ancient English common law"
https://www.encyclopedia.com/social-sciences-and-law/law/law/posse-comitatus-act
"Common Law, sometimes called ‘case law’ or ‘judge-made law’ goes way back. It really started to find its feet after the Norman Conquest of 1066, replacing local law"
http://www.lawplainandsimple.com/legal-guides/article/the-basics-of-common-law
"The ideas of the "sovereign citizens" movement originate in the ideology of the Posse Comitatus"
https://www.splcenter.org/fighting-hate/intelligence-report/2015/what-sovereign-citizen
"Sheriff's Posse Comitatus [SPC]
The common law courts and sovereign citizens are the direct ideological descendants of the Posse Comitatus; any attempt to understand the common law courts must start with the this group. The Posse, though, is not necessarily an easy entity to understand"
https://www.globalsecurity.org/military/world/para/spc.htm
"They also create their own “legal papers” and claim they are subject only to English common law.
Sovereigns generally dislike law enforcement, and some have turned to physical violence. For this reason, officers should exercise caution when interacting with them.
Although sovereign citizens share no common physical characteristics, peace officers can look for certain indicators to help identify them. For instance, a sovereign citizen’s vehicle may not have a license plate, or it may have a fake plate for a non-existent state or country. The vehicle may have anti-government bumper stickers or window decals that say “Posse Comitatus,” meaning “Power of the County.”"
https://www.ohioattorneygeneral.gov/Media/Newsletters/Law-Enforcement-Bulletin/April-2013/Sovereign-citizen-encounters-What-officers-should
"The legal theories of Posse Comitatus have been further developed by the sovereign citizen movement, which claims that a U.S. citizen can become a “sovereign citizen” and thereby be subject only to common law and/or “constitutional law,” not to statutory law (including most taxes).[13]"
https://rosamondpress.com/2014/04/25/posse-comitatus-localism/
"The "sovereign citizen" movement is a loosely organized collection of groups and individuals who have adopted a right-wing anarchist ideology originating in the theories of a group called the Posse Comitatus in the 1970s."
https://www.adl.org/resources/backgrounders/sovereign-citizen-movement
"The Posse Comitatus is a loose association of people who share the same beliefs, a blend of Christian Identity, tax protest, Sovereign Citizen ideology, and common law activism. Posse Comitatus followers believe that the sheriff is the highest legitimate government authority, and that the federal government has no rightful power over American citizens."
https://www.trackingterrorism.org/group/sheriffs-posse-comitatus
"The Posse Comitatus was a right-wing extremist group that contended that the true intent of the country’s founders was to establish a Christian republic where the individual was sovereign, and that the Republic’s first duty was to promote, safeguard, and protect the Christian faith"
http://nebraskastudies.org/en/1975-1999/foreclosures-lead-to-violence/posse-comitatus/
"The sheriff’s “posse comitatus,” which is Latin for the “power of the county” or “possible force,” originates from old English law. The phrase should not be mistaken with the “Posse Comitatus Act,”"
https://www.goshennews.com/news/local_news/ask-the-sheriff-sheriff-explains-the-role-of-posse-comitatus/article_88d090fd-02e1-595d-9783-a85db9ae37eb.html
"A manual evidently written by the militant anti-tax group Posse Comitatus calls for members to prepare for terrorism and guerrilla warfare in pursuit of the group’s aims, says Sheriff Walter Schardt."
https://apnews.com/article/2f6bc77e106ec869d53a05669aa4ed40
"the entire body of the inhabitants who may be summoned by the sheriff to assist in preserving the public peace (as in a riot) or in executing a legal precept that is forcibly opposed including under the common law every male inhabitant who is above 15 years of age and not infirm"
https://www.merriam-webster.com/dictionary/posse%20comitatus
"From Anglo-Saxon times until the present, a core power of the Sheriff has been the authority to summon posse comitatus–“the power of the county.” Like jury service, posse service is a mandatory duty of the citizen. When the Sheriff, in his nearly unlimited discretion, summons the posse, the citizen must respond."
https://www.washingtonpost.com/news/volokh-conspiracy/wp/2014/05/15/sheriffs-and-the-posse-comitatus/
"Sheriffs executing a warrant were empowered by the common law to enlist the aid of the able-bodied men of the community in doing so. While serving as part of this “posse comitatus,” a private individual had the same authority as the sheriff, and was protected to the same extent."
https://www.msn.com/en-us/news/us/trump-reportedly-wants-to-send-the-army-to-minneapolis-heres-what-the-law-says-about-posse-comitatus/ar-BB14OqP4
"On May 29, 1984, Portage County Sheriff Dan Hintz locked his pistol in his car and walked into a compound of a right-wing extremist group called the Posse Comitatus."
https://www.wausaudailyherald.com/story/news/local/2015/07/12/dan-hintz-posse-comitatus/30009027/