(Rubicō, Italian: Rubicone) is a 29 km long river in northern Italy. The river flows from the Apennine Mountains to the Adriatic Sea through the southern Emilia-Romagna region between the towns of Rimini and Cesena.
“Crossing the Rubicon” is a popular idiom meaning to pass a point of no return. This phrase is often used by journalists in newspapers[1][2][3][4]. It refers to Caesar’s 49 BC crossing of the river, which was considered an act of war.