Piedmontese invasion of the Papal States (1860)

The Piedmontese invasion of the Papal States (1860), also known as the Campaign in the Marche and Umbria, was a military conflict that took place between 11 and 29 September 1860. It was fought between the Kingdom of Sardinia and the Papal States during the final stages of the Italian unification.

Source: Wikipedia — Piedmontese invasion of the Papal States (1860) (CC BY-SA 4.0)