The Italian Social Republic (, ; RSI), known prior to December 1943 as the National Republican State of Italy (; SNRI), but more popularly known as the Republic of Salò ( ), was a Nazi-German puppet state with limited diplomatic recognition which was created during the later part of World War II, that existed from the beginning of the German occupation of Italy in September 1943 until the surrender of German troops in Italy in May 1945. The German occupation triggered widespread national resistance against it and the Italian Social Republic, leading to the Italian Civil War. The Italian Social Republic was the second and last incarnation of the Italian Fascist state, led by Benito Mussolini and his reformed anti-monarchist Republican Fascist Party. The newly-founded state declared Rome its capital but was de facto centred on Salò (hence its colloquial name), a small town on Lake Garda, near Brescia, where Mussolini and the Ministry of Foreign Affairs were headquartered. The Italian Social Republic nominally exercised sovereignty in Northern and Central Italy, but was largely dependent on German troops to maintain control. In July 1943, after the Allies had pushed Italy out of North Africa and subsequently invaded Sicily, the Grand Council of Fascism—with the support of King Victor Emmanuel III—overthrew and arrested Mussolini. The new government began secret peace negotiations with the Allied powers. When the Armistice of Cassibile was announced 8 September, Nazi Germany was prepared and quickly intervened. German troops seized control of the northern half of Italy, freed Mussolini, and brought him to the German-occupied area to establish a satellite regime. The Italian Social Republic was proclaimed on 23 September 1943. Although the RSI claimed sovereignty over most of the Italian Peninsula, its de facto jurisdiction only extended to a vastly reduced portion of the country. The RSI received diplomatic recognition only from the Axis powers and their satellite states. Finland and Vichy France, although in the German orbit, did not recognize it. Unofficial relations were maintained with Argentina, Portugal, Spain and, through commercial agents, Switzerland. The Vatican City did not recognize the RSI. Around 25 April 1945, nineteen months after its founding, the RSI all but collapsed. In Italy, the day is known as Liberation Day (festa della liberazione). On that day, a general partisan uprising, alongside the efforts of Allied forces during their final offensive in Italy, managed to oust the Germans from Italy almost