In London, the cry went up for volunteers for Italy. Focused on the Birmingham Political Union, nearly 3,000 men, mostly unemployed factory workers from the Midlands and North West of England, headed to the capital to sign up for what became known as the International Brigade, which ended up under the leadership of John Frost, a Welsh radical. The new French ambassador, the aging hero and carbonaro Marquis de La Fayette, arranged with Paris for these men to be given passage.
There was a similar phenomenon elsewhere. As well as English volunteers, Irishmen, Dutchmen, Liegeois, Prussian liberals, Swiss and Frenchmen flooded south. There was a simmering sense of revolt across Italy.
Finally, on the 18th September, French troops landed at Ancona, and other French troops crossed from Lucca into Modena, given free passage by Francis IV. They were heading east. The next day, the Austrian ambassador delivered an ultimatum to Louis-Philippe. It went unanswered. With Russia, Britain and Prussia declaring their neutrality and watching (all three more concerned elsewhere, especially Russia), Austria felt safe in taking on the French at a distance from the French mainland. Thus, Austria declared war on France on the 1st October, 1831. It was all a formality: France and Modena had already begun offensive action.
Radetzky was now wheeling through Romagna, and already held Ferrara. Turning to Ancona to meet the French landing, he was forced to halt when news came through that a Franco-Modenese force had crossed the border near Finale Emilia. If he didn't deal with them, they would cut off his supply lines. He pulled back to Forli and began to head back north.
Worse news for the Austrians was on its way. Emboldened by French action and promises of support, Sardinian troops crossed tentatively into Lombardy-Venetia. Then, on the 2nd October, rioting broke out in Padua and Treviso in Lombardy-Venetia. It was a national emergency for Austria now.
Mazzini was in raptures. The dream was coming true. Or was it?