Which of these was a major event in the Revolutionary Year of 1848 in Italy?

The Five Days of Milan was a major event in the Revolutionary Year of 1848 and the start of the First Italian War of Independence. On 18 March, a rebellion arose in the city of Milan, and in five days of street fighting drove Marshal Radetzky and his Austrian soldiers from the city.

In 1848, the Milanese launched an anti-Austrian campaign as early as 1 January. On New Year's Day the Milanese started to boycott gambling and tobacco products, which were government monopolies that brought in over 5 million lire a year. The boycott culminated in a bloody street battle on 3 January, when Austrian soldiers, in batches of three, were being insulted and pelted with stones by an angry crowd. The soldiers then gathered together in groups of a dozen and charged the crowd with swords and bayonets, killing five and wounding another 59. Radetzky confined his troops to barracks for five days. The protests were over, but two months later, when news reached Milan of the uprising in Vienna and the fall of Metternich, the Milanese took to the streets again, on 18 March.