A shallow river in northeastern Italy, about 80 kilometres long, running from the Apennine Mountains to the Adriatic Sea through the southern Emilia-Romagna region, between the towns of Rimini and Cesena.
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 line that when crossed permits of no return and typically results in irrevocable commitment
the boundary in ancient times between Italy and Gaul; Caesar''s crossing it with his army in 49 BC was an act of war