Complex sentence: Although little noticed at the time, the first major outbreak came in Sicily, starting in January 1848.The 12th, in fact, in Palermo, the first revolution crushed in the whole Europe, developing a domino effect that fast spread throughout the continent.
Split into simpler sentences: Although little noticed at the time, the first major outbreak came in Sicily, starting in January 1848. During January 12th, 1848, in Palermo, the first revolution crushed in the whole Europe, developing a domino effect that fast spread throughout the continent.