Broken Trail

Broken Trail is a 2006 Western miniseries directed by Walter Hill and starring Robert Duvall and Thomas Haden Church. Written by Alan Geoffrion, who also wrote the novel, the story is about an aging cowboy and his nephew who transport 500 horses from Oregon to Wyoming to sell them to the British Army. Along the way, their simple horse drive is complicated when they rescue five Chinese girls from a slave trader, saving them from a life of prostitution and indentured servitude. Compelled to do the right thing, they take the girls with them as they continue their perilous trek across the frontier, followed by a vicious gang of killers sent by the whorehouse madam who originally paid for the girls.

In San Francisco in 1898, countless Chinese girls are sold into slavery and brought to the American West to live as prostitutes among the miners and railway workers. Capt. Billy Fender James Russo arrives in San Francisco and purchases five Chinese girls to be sold as prostitutes in Idaho.In southeastern Oregon, Prentice Prent Ritter Robert Duvall, an aging cowboy, arrives at the Gap Ranch to inform his cowboy nephew, Tom Harte Thomas Haden Church, that his mother died. Estranged from her son years earlier after he left the family ranch to become a buckaroo, she left behind a brief impersonal note informing her son that she left everything in her will to her brother Prent. Uncomfortable with her unfair decision, and wanting to reconnect with his nephew, Prent tells him about his plan to transport 500 horses from Oregon to Sheridan, Wyoming, where he will sell them to the British Army. He offers Tomof the profits if he joins him in the business venture. ........

Source: Wikipedia