The First Italian War of Independence, part of the Risorgimento or unification of Italy, was fought by the Kingdom of Sardinia (Piedmont) and Italian volunteers against the Austrian Empire and other conservative states from 23 March 1848 to 22 August 1849 in the Italian peninsula. The conflict was preceded by the outbreak of the Sicilian revolution of 1848 against the House of Bourbon-Two Sicilies. It was precipitated by riots in the cities of Milan and Venice, which rebelled against Austria and established governments.