San Rocco Church - Campi

In 1853 the San Rocco Church receives its majestic pipe organ. Some years later, in 1866, from 25th July to 10th August, Campi was occupied by Garibaldi's soldiers. What is the connection between these two facts? Because the San Rocco Church, or better pipe organ told the 17 days of the Garibaldi's soldiers and much more.