As we set the scene for the start of Cesare Borgia's military campaign, we start to observe the ominous signs of what is to come in Rome with the arbitrary accusation and confiscations of the Roman nobility.
Then we go exploring to see what we intend with the term "Romagna" and trace it back to Marcus Aemilius Lepidus, the Byzantines and Julius Cesar's famous "The die is cast" speech, pronounced in Rimini after crossing the Rubicon river which we will also do to visit with the Malatesta of Rimini before Cesare comes to face of with Caterina Sforza to start his conquest.
See link to Romagna explanation: