What happened August 1860 AD

Garibaldi proceeded to the mainland, crossing the Strait of Messina with the Neapolitan fleet at hand. The garrison at Reggio Calabria promptly surrendered. As he marched northward, the populace everywhere hailed him, and military resistance faded: on 18 and 21 August, the people of Basilicata and Apulia, two regions of the Kingdom of Naples, independently declared their annexation to the Kingdom of Italy.

At the end of August, Garibaldi was at Cosenza, and, on 5 September, at Eboli, near Salerno. Meanwhile, Naples had declared a state of siege, and on 6 September the king gathered the 4,000 troops still faithful to him and retreated over the Volturno river.