Caesar was appointed governor of the vast region of Gaul (north-central Europe) in 58 B.C., where he commanded a large army. ... Caesar refused and, in a bold and decisive maneuver, directed his army to cross the Rubicon River into Italy, triggering a civil war between his supporters and those of Pompey.
To summarize a favorite movie or novel, you should include; a description of the main characters, the setting of the story, the central conflict in the story, and major plot events.