Complex sentence: The Neapolitan War between the Napoleonic Kingdom of Naples and the Austrian Empire, started on 15 March 1815 when Joachim Murat declared war on Austria and ended on 20 May 1815 with the signing of the Treaty of Casalanza.
Split into simpler sentences: The Neapolitan War was a conflict between the Napoleonic Kingdom of Naples and the Austrian Empire. It started on 15 March 1815 when Joachim Murat declared war on Austria and ended on 20 May 1815 with the signing of the Treaty of Casalanza.