To cross the Rubicon is a metaphor which means to take an irrevocable step that commits one to a specific course. When Julius Caesar was about to cross the tiny Rubicon River in 49 B.C.E., he quoted from a play by Menander to say "anerriphtho kybos!" or "let the die be cast" in Greek. But what kind of die was Caesar casting and what decision was he making?
Before the Roman Empire
Before Rome was an Empire, it was a Republic. Julius Caesar was a general of an army of the Republic, based in the north of what is now Northern Italy. He expanded the borders of the Republic into modern France, Spain, and Britain, making him a popular leader. His popularity, however, led to tensions with other powerful Roman leaders.
