Among the newspaper clippings is a story about the Lincoln County War. This was a conflict between farmers and ranchers in New Mexico during which landowners hired gunmen (known as "regulators") to serve as enforcers. Billy the Kid was among this group for a time.
This is Tim Blake Nelson's fifth western genre outing after Dead Man's Walk (1996), The Homesman (2014), Klondike (2014) and La ballata di Buster Scruggs (2018).
The "lawmen" claim to be from Woods County, OK. The county seat of Woods County, Alva, is 160 miles north of Chickasha, (the setting for the film).
The cast is entirely male, with no female roles whatsoever, except for one mention of the grave of Henry's wife.
Chickasha, OK, is referenced as being the closest town. Chickasha is in Grady County in central Oklahoma. In 1906, the population of Chickasha was about 7,500 and Grady County had less than 30,000 people.