Soon after World War I in late 1922 Rome witnessed the rise of Italian Fascism led by Benito Mussolini, who led a march on the city. He did away with democracy by 1926, eventually declaring a new Italian Empire and allying Italy with Nazi Germany in 1938. Mussolini demolished fairly large parts of the city centre in order to build wide avenues and squares which were supposed to celebrate the fascist regime and the resurgence and glorification of classical Rome. The interwar period saw a rapid growth in the city's population which surpassed one million inhabitants soon after 1930. During World War II, due to the art treasuries and the presence of the Vatican, Rome largely escaped the tragic destiny of other European cities. However, on 19 July 1943, the San Lorenzo district was bombed by Anglo-American forces, resulting in about 3,000 immediate deaths and 11,000 wounded of whom another 1,500 died. Mussolini was arrested on 25 July 1943. On the date of the Italian Armistice 8 September 1943 the city was occupied by the Germans. The Pope declared Rome an open city. It was liberated on 4 June 1944.