Realism versus Romanticism in “An Occurrence at Owl Creek Bridge” In Ambrose Bierce’s “An Occurrence at Owl Creek Bridge”, Bierce illustrates the change from the Romantic period to the Realism period. The Romantic period focused on heroes and excessive imagery, while Realism pertained to events that could happen in real life. The period shift came about in the 1870’s. “An Occurrence at Owl Creek Bridge” illustrates this shift, as well as gives Bierce’s commentary on the two literary periods.