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How did Mussolini become prime minister through the March on Rome?

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Benito Mussolini in military uniform stands on a balcony, addressing a large crowd gathered below. — fascism Italian fascist leader Benito Mussolini addressing a rally.

The March on Rome was an insurrection orchestrated by Benito Mussolini and the Fascist Party in October 1922 to seize control of the Italian government.12

Following a convention in Naples on October 24, fascist leaders mobilized armed Blackshirts to converge on Rome and capture strategic locations across Italy. On October 28, the government of Prime Minister Luigi Facta attempted to counter the threat by ordering a state of siege. However, King Victor Emmanuel III refused to sign the decree, effectively preventing the military from opposing the fascists.32

Faced with this surrender of public authority and the threat of intimidation, the King invited Mussolini to form a government on October 29. Mussolini arrived in Rome by train on October 30 to accept the position of prime minister. While often framed as a conquest, the event was a transfer of power within the constitutional framework, facilitated by the state's failure to resist fascist pressure.32