The Three Rebellions

In Episode IX of Brazilian's Varna series, the Three Rebellions were three simultaneous uprisings that took place from 1505-1506 in the Italian League nations.
In 1505, the count of Provence died heirless, so Naples was in line to be successor. This began the First Rebellion, where the Provençal populace rejected the Neapolitan ruler. Before the government in Napoli could send aid to the Provençal loyalists, a Second Rebellion began in Sicily. Naples had no choice but to call in their allies, Sardinia and Venice, who accepted. This allowed the rival alliance, the Maghrebi League, to initiate the Third Rebellion - an uprising in Sardinia's North African territory by people wishing to return to the Kingdom of Tlemcen.
All three rebellions were to no avail, as the Italian League put them down quickly. They made sure to sign the Treaty of Marseille so that the new personal union between Naples and Provence would be recognised by all of Europe.