sibling relationship, post-traumatic stress disorder (ptsd), based on novel or book, world war i, journey around the world, montana, loyalty, ranch, affectation, native american, tragedy, interracial marriage, sibling rivalry, falling in love, interracial friendship, 1910s, 1900s, political aspiration, father son relationship, brother brother relationship, prohibition, beautiful landscapes, melodramatic, u.s. army soldier,