A small river which separated Italy from Cisalpine Gaul, the province alloted to Julius Cæsar.
the boundary in ancient times between Italy and Gaul; Caesar's crossing it with his army in 49 BC was an act of war
A river that formed the frontier between the provinces of Gaul and Northern Italy. Caesar famously crossed it in January, 49 BC, beginning a civil war.
A stream in central Italy.
The Rubicon (RubicÅ, Italian: Rubicone) is an ancient Latin name for a small river in northern Italy. It is believed that in Roman times it flowed into the Adriatic Sea between Ariminum (Rimini) and Caesena (Cesena). The actual modern identity of the river is uncertain; it is usually identified as the Pisciatello in its upper reaches and then the Fiumicino to the sea.