The Battle of Tolentino was fought from 2–3 May 1815 near Tolentino, Kingdom of Naples in what is now Marche, Italy: it was the decisive battle in the Neapolitan War, fought by the Napoleonic King of Naples Joachim Murat to keep the throne after the Congress of Vienna. The battle was similar to the Battle of Waterloo. Both occurred during the Hundred Days following Napoleon's return from exile and resulted in a decisive victory for the Seventh Coalition, leading to the restoration of a Bourbon king.
By the end of April 1815, Murat had lost all the early gains he made at the start of the war as two advancing Austrian corps under the command of Generals Bianchi and Neipperg forced the Neapolitans south-east to a base in Ancona. The two Austrian corps had become separated on either side of the Apennine Mountains and Murat hoped to defeat Bianchi to the west before quickly turning on Neipperg, who had been pursuing his retreat from the north. His plan was similar to Napoleon's plan to defeat the British before turning on the Prussians during the Waterloo Campaign.
Murat planned to face Bianchi near the town of Tolentino. Dispatching a small force under General Michele Carrascosa to delay Neipperg, Murat moved his main force to meet Bianchi. On 29 April, a small advance party of Hungarian hussars routed the small Neapolitan garrison stationed in Tolentino. With the Austrian vanguard already established in Tolentino, Murat's army camped to the north east in Macerata. Bianchi realised Murat's plan and decided to delay Murat for as long as possible. The Austrians established a defensive line based on the Tower of San Catervo, with further troops being positioned at Rancia Castle, the church of Maestà and at Saint Joseph. Murat had to force the issue and march on Bianchi. The two armies met on 2 May.
The battle opened at dawn with an artillery bombardment from both sides on the valley leading north to Sforzacosta. Although the Austrians were already established around Tolentino, Murat managed to catch them by surprise. In the opening engagements, Neapolitan troops managed to surround and capture General Bianchi near Sforzacosta but he was almost immediately freed by a regiment of Hungarian hussars. By mid morning, the Neapolitan army had concentrated near Pollenza, with fierce fighting in the area. During the day, the main action occurred around the Austrian outpost at Rancia Castle, which changed hands many times. By the end of the first day, although the Neapolitan army had the upper hand and had made slight gains, including Monte Milone, the Austrians were still in an excellent defensive position.
On the second day, fog delayed the start of battle until 7:00 a.m. The day started well for Murat as the Neapolitan army managed to take Rancia Castle as well as the hills of Cantagallo. From here, the Neapolitans staged a further attack on the Austrian positions. Two Neapolitan infantry divisions, including Murat's Guard Division, descended from Monte Milone against the Austrian left flank. The Neapolitans made the mistake of forming square, expecting a swift cavalry counter-attack, which never happened. The Austrian infantry delivered a series of volleys, supported by devastating artillery fire. General Mohr (de) had also repulsed an attack on the Austrian right and the entire Neapolitan line fell back to Pollenza. With the result of the battle still undecided, Murat received word Neipperg had defeated Carascosa at the Battle of Scapezzano and was approaching. To make matters worse, he received false rumours that a British fleet had just unloaded a Sicilian army in the south of Italy, threatening his line of retreat. Unbeknownst to Murat, the British fleet were sailing to blockade Naples and Ancona. Murat sounded the retreat and the fighting ended. Murat fell back to Naples but with the Austrians approaching by land and the British by sea, he had no choice but to flee to Corsica, disguised as a Danish sailor. The battle proved decisive; on 20 May 1815, Austria and Naples concluded the Treaty of Casalanza, restoring Ferdinand IV to the throne.