The American West was a dangerous place for even the most benevolent of people, as seen in Horizon: An American Saga Chapter 1. The movie, which hails from Kevin Costner in his first directorial effort in over 20 years since 2003’s Open Range, is a four-part journey through the pre- and post-Civil War eras of the country, primarily exploring the creation of the fictional eponymous settlement and how it and the people were a part of the expansion into the American West.
https://screenrant.com/horizon-an-american-saga-chapter-1-sienna-miller-sam-worthington-interview/