After receiving word of Murat's defeat at Tolentino, Nugent moved to intercept his retreat back to Naples.

The following day, Murat decided to counterattack and drove back Nugent's vanguard, before attacking the entire Austrian line.

However, another Austrian force of 25,000 men under the command of Frederick Bianchi, which had followed Murat from Tolentino, were now moving to surround the Neapolitan position.

With the attack faltering, and the Neapolitans beginning to sustain substantial casualties, Murat pulled back to San Germano and formed a defensive position.

With the entire Army of the Interior now in disarray, Murat chose to flee Italy altogether on 19 May and the Neapolitans sued for peace, resulting in the Treaty of Casalanza.