On October 28, 1922, the Italian fascist Benito Mussolini and his followers organized the March on Rome. This political march of the fascists was not very well organized, but it eventually led to the seizure of power by fascism.
March on Rome was supposed to be a coup
The March on Rome was intended as a coup d’état. Four days earlier, Mussolini had declared to his supporters at a party congress in Naples:
“Either they give us the government, or we go to Rome and take the government.”
At that time, the fascists already controlled large parts of northern Italy and Mussolini enjoyed great support from landowners and industrialists. Two days after the party congress in Naples, the government offered its resignation, but King Victor Emmanuel III did not immediately accept this resignation, so that the government remained in office for the time being. Mussolini issued an ultimatum to the government, and tensions rose further when incumbent Prime Minister Luigi Facta declared martial law and ordered the military to use force if necessary against the fascists if they did indeed advance to Rome.

However, this did not stop Mussolini. He gathered his supporters near Rome and then marched into the city. There the fascists had to occupy public buildings. After this, Prime Minister Luigi Facta would be forced to resign and a fascist regime had to be installed. If this failed peacefully, armed blackshirts would march into Rome and complete the coup by force.
Problems, taking power & Era Fascista
The fascists then instituted a new time division in Italy: the Era Fascista, abbreviated EF. On October 28, 1922, the year 1. From October 1927 to April 1945, this era was compulsory in Italy.