"The recent assassination of Napoleon III by members of the Carbonari, however, had caused a schism in Cispadanian politics. Felice Orsini and the other members of his crew had worn green, white and red tri-colour handkerchiefs in their jacket pockets based on the protest flags that had become popular in 1848 as the symbol for Italian unification. It had even been adopted as the national flag of the Republic of Tuscany. modified from the version suggested by the first Present, the former Duke Leopold II, that had contained the coat of arms of his duchy. Napoleon III had been seen as being pro-Italian unity and a man to be admired, thanks to his younger days as part of decentralised movement that killed him, but leaks from French newspaper La Presse had changed that. Leaflets from Rome and pamphlets from Florence were distributed across the central Italian peninsula that expounded on how the secret agreement between His Imperial Majesty and Prime Minister of the Kingdom of Sardinia, Count Cavour was a betrayal of republican ideals. It signalled, they said, that the Savoyards were just puppets of the French, indeed that they were actually more French than Italian.
"That the tri-colour was a popular symbol was undeniable, even to the Tuscans who were now slightly ashamed of it, and republican fervour called for the nation to be named the Cispadane Republic, after the previous country of that name from 1796 before the original Napoleon, now tarred by association, declared himself emperor. That the flag was a tri-band instead of a tri-colour yet contained the same three colours was seen as fortuitous during those first sessions of the new legislature. The deputies from Tuscany, with a decade of experience in the practicalities of democratic rule, were not particularly anti-imperialist having elected their old Duke as president of their republic not once but twice. They were inclined, though, to accept the Savoyard-expansionist claims of the pamphlets and did not want to once again bow to an unelected monarch. This shared sentiment is what brought the new nation together in the first place and they papered over any disagreements with proposals for the new three-banded flag of the Republic.
"If you've ever wondered why your conservative relatives from the northern parts of the country scoff at your political leanings as 'non è orizzontale', or why you both insult each other in jest as 'savoiardo', that is why."
-- excerpted from "Italia: Un ex e futuro nazione", and editorial in La Nazione, 3 September 1996.
Flag of the (new) Cispadane Republic from my "Balance of Power" ATL.