I only saw the 20 minutes or so I described in the title, but it looked interesting. Searching reveals lots of movies about the civil war, but as far as I could tell it wasn’t really part of the story except as the reason the husband left.
It looked like a 90s movie, or possibly a 2000s TV movie. I didn’t recognize any actors, but I’m bad at that so I can’t assume the wife wasn’t super famous.
She’s attacked by maybe a neighbor? in a black flat-crowned cowboy hat just a few minutes (of movie) after the husband left.
She wakes up on the bed with a bloody pillow under her head, and has to go to work in the saloon. The owner says something like “this is your only warning to be punctual” and then he sees her bruises as she’s tying in her apron. As he is staring at her face, the perpetrator walks in with his own bruises, notices he’s being stared at as people make the connection, and he backs out. That’s the last thing I saw.