The Last Man (1916)

After a tour of duty in the Philippines, Major Harvey, an army surgeon, returns to his home in Montana to discover his wife Lorna has begun an affair with Lieutenant Horne, whom she marries after Harvey divorces her. Weary of his former wife's high society sophistication, Harvey falls in love with Jeanne MacDonald, a young woman from the mountains, and, giving her a job as an army nurse, returns with her to the Philippines. Meanwhile, Horne has also been stationed there, and brings Lorna with him. The Philippine rebels attack the Americans, and the two couples find themselves under siege together. During the fighting, Lorna, tired of Horne, begins flirting with her ex-husband. After the rebels have been defeated, however, Harvey rejects Lorna and marries Jeanne.