From 1922, Fascist dictator and prime minister Benito Amilcare Andrea Mussolini, known as "il Duce," conducted an expansionist foreign policy, formalized an alliance with Germany in 1939, and brought Italy into World War II in 1940; Victor Emmanuel III in 1943 dismissed him, who led a puppet government of Nazis in north until 1945, when people assassinated him.
Victor Emmanuel III appointed him as prime minister in 1922.
Mussolini outlawed the Communist party of Italy of Antonio Gramsci.
Mussolini, originally a socialist and a journalist, worked at Avanti!, the newspaper. In 1912, he joined as a member of the national directorate of the Socialist party, which nevertheless expelled him for advocating military intervention in opposition to the stance on neutrality. In 1914, Mussolini founded Il Popolo d'Italia, a new journal, and served in the royal Army until someone wounded him, and the Army discharged him in 1917.
This journalist founded the national party. The establishment of the combat in 1919 and the march on Rome in 1922 continued.
Mussolini denounced the socialist party, his views then centered on nationalism instead, and he later founded the movement, which came to oppose egalitarianism and class conflict and to advocate "revolutionary nationalism," transcending class lines. Following the march on Rome of 28–30 October 1922, the king appointed Mussolini, the youngest individual to hold the office to that time on 31 October. After removing all opposition through his secret police and outlawing labor strikes, Mussolini and his followers consolidated power through a series of laws that transformed the nation into one party. Within five years, Mussolini via illegal means established authority and aspired to create a totalitarian state.
As principal founder, Mussolini inspired and supported the international spread of movements during the intervening period.
In 1929, Mussolini signed the Lateran treaty with the Holy See to establish Vatican City.
Mussolini aimed colonial possessions and the sphere of influence to restore the ancient grandeur of the Roman Empire. Between 1936 and 1939, Mussolini ordered the successful civil military intervention in Spain in favor of Francisco Franco. Mussolini initially tried to avoid the global outbreak and sent troops at the Brenner Pass to delay Anschluss and took part in the Stresa front, the Lytton report, the treaty of Lausanne, the four-power pact and the Munich agreement.
On 10 June 1940, Mussolini decided to enter on the side of the Axis. Despite initial success, the subsequent Axis collapse on multiple fronts and eventual Allied invasion of Sicily made Mussolini lose the support of the population and members of the Fascist party.
As a consequence, early on 25 July 1943, the grand council of Fascism passed a motion of no confidence in Mussolini as head and; later in that day, the king placed him in custody and appointed Pietro Badoglio to succeed him. After the king agreed to an armistice with the Allies, Otto-Harald Mors, major, paratroopers, and commandos of Waffen-Schutzstaffel on 12 September 1943 from captivity rescued Mussolini in the raid of gran Sasso. Adolf Hitler met with the rescued former Mussolini and afterward then put him in charge of a social regime, informally the Salò republic, to cause civil unrest.
In the wake of near total defeat, Mussolini and Claretta Petacci, his mistress, in late April 1945 attempted to flee to Switzerland, but Communist partisans captured them, and firing squad summarily executed both on 28 April 1945 near Lake Como. People took the bodies of Mussolini and his mistress to Milan and hung them upside at a service station to publicly confirm their demise.