Early on in the movie, it's made known that he was a Union soldier during the American Civil War, so he's instantly easy to root for.

Source: https://collider.com/franco-nero-django-spaghetti-western-king/

Horizon: An America Saga is set over a 15-year period during the American Civil War.

Source: https://www.comingsoon.net/movies/trailers/1358702-horizon-chapter-1-2-release-dates-set-for-kevin-costner-western-movie

Memorial Day has a rich history dating back to the aftermath of the American Civil War.

Source: https://www.chiangraitimes.com/news/memorial-day-2023-honoring-the-sacrifice/

The American Civil War is one of the most studied and dissected events in our history—but what you don't know may surprise you.

Source: https://www.history.com/topics/american-civil-war/draft-riots

The film is based on a true story of an event from the American Civil War.

Source: https://collider.com/buster-keaton-limited-series-cast-rami-malek/

The scars of the American Revolution and the American Civil War are still ubiquitous.

Source: https://www.theepochtimes.com/article/this-city-elected-a-republican-mayor-for-the-first-time-since-1877-post-5537511