The Keeping Room (2015)

The Keeping Room, starring Brit Marling and Hailee Steinfeld, is a grim take on the end of the Civil War, when many families have been decimated and left without much protection. Brit and Hailee play two sisters, Augusta and Louise, who have lost their parents and live with their slave on an isolated farm. One day, after Augusta makes a trip to a saloon looking for medicine, two men decide to track her down as part of their murder rampage. Once back at the house, the three have to defend themselves against all odds if they want to survive. The three women are much tougher than they look, and Brit Marling even stops to take off her shirt at one point, though you can only see her bare back. They might not need any men in their lives, but we'd volunteer to spend some time!