God's Bloody Acre (1975)

 God's Bloody Acre (1975)

A trio of separatist hillbillies mobilize to halt the development of a campsite in their deep-woods homestead. What begins as a harmless scheme to scare people away quickly turns deadly. (IMDB  EyeAskance)

It seems that a lot of films liked to claim they were based on true events
though it was often just a marketing ploy.