city in 1798 to warn against it. However, Ferdinand was forced to retreat and fled to Palermo, where he was protected by a British fleet. Naples' lower classes (the lazzaroni) were pious and Royalist, favouring the Bourbons; in the mêlée that followed, they fought the Neapolitan pro-Republican aristocracy, causing a civil war. The Republicans conquered Castel Sant'Elmo and proclaimed a Parthenopaean Republic, secured by the French Army. A counter-revolutionary religious army of lazzaroni under Fabrizio Ruffo was raised; they had great success and the French surrendered the Neapolitan castles and were allowed to sail back to Toulon. Ferdinand IV was restored as king; however, after only seven years Napoleon conquered the kingdom and instated Bonapartist kings including his brother Joseph Bonaparte. With the help of the Austrian Empire and allies, the Bonapartists were defeated in the Neapolitan War and Bourbon Ferdinand IV once again regained the throne and the kingdom. The Congress of Vienna in 1815 saw the kingdoms of Naples and Sicily combined to form the Two Sicilies, with Naples as the capital city. Naples became the first city on the Italian peninsula to have a railway in 1839, there were many factories throughout the kingdom making it a highly important trade centre. World War II In September 1943, Salerno was the scene of Operation Avalanche and suffered a great deal of damage. From 12 February to 17 July 1944, it hosted the Government of Marshal Pietro Badoglio. In those months Salerno was the temporary "Capital of the Kingdom of Italy", and the King Victor Emmanuel III lived in a mansion in its outskirts. Salerno received the first "Tricolore" in an official ceremony on 7 January 2012 from the premier Mario Monti, to celebrate the glorious story of Italy and its old capitals. Geography Campania has an area of and a coastline of on the Tyrrhenian Sea. Campania is famous for its gulfs (Naples, Salerno and Policastro) as well as for three islands (Capri, Ischia and Procida). Four other regions border Campania; Lazio to the northwest, Molise to the north, Apulia (Puglia) to the northeast and Basilicata to the east. The mountainous interior is fragmented into several massifs, rarely reaching 2,000 metres (Miletto of 2,050 m), whereas close to the coast there are volcanic massifs: Vesuvio (1,277 m) and Campi Flegrei. The climate is typically Mediterranean along the coast with warm, sunny and sultry summers and mild, rainy winters,