Complex sentence: Bierce then wakes up, talks to a local bartender about his intentions to join Pancho Villa's revolutionary army, and proceeds to join a stagecoach transporting a newlywed couple, John and Mary Newlie, who are traveling Mexico to preach Christianity.
Split into simpler sentences: Bierce then wakes up and talks to a local bartender about his intentions to join Pancho Villa's revolutionary army. He joins a stagecoach transporting a newlywed couple, John and Mary Newlie, who are traveling to Mexico to preach Christianity.