Blackshirts

History

The Blackshirts were established as the squadristi in 1919 and consisted of many disgruntled former soldiers. It was given the task of leading fights against their bitter enemies – the Socialists. They may have numbered 200,000 by the time of Mussolini's March on Rome from 27 to 29 October 1922. In 1922 the squadristi were reorganized into the milizia and formed numerous bandiere, and on 1 February 1923 the Blackshirts became the Voluntary Militia for National Security (Milizia Volontaria per la Sicurezza Nazionale, or MVSN), which lasted until the 8 September 1943 Armistice of Cassibile. The Italian Social Republic, located in the areas of northern Italy occupied by Germany, reformed the MVSN on 8 December 1943 into the National Republican Guard (Guardia Nazionale Repubblicana, or GNR).

Organization

Benito Mussolini was the leader, or Commandant–General and First Honorary Corporal, of the Blackshirts, but executive functions were carried out by the Chief of Staff, equivalent to an army general. The MVSN was formed in imitation of the ancient Roman army, as follows:

Territorial organization

The MVSN original organization consisted of 15 zones controlling 133 legions (one per province) of three cohorts each and one Independent Group controlling 10 legions. In 1929 it was reorganized into  four raggruppamenti, but later in October 1936 it was reorganized into 14 zones controlling only 133 legions with two cohorts each, one of men 21 to 36 years old and the other of men up to 55 years old. There were also special units in Rome, on Ponza Island and the black uniformed Moschettieri del Duce ("The Leader's Musketeers", Mussolini's Guard), the Albanian Fascist Militia (four legions) and Milizia Coloniale in Africa (seven legions).

World War II

In 1940 the MVSN was able to muster 340,000 first-line combat troops, providing three divisions (1st, 2nd and 4th – all three of which were lost in the North African Campaign) and, later in 1942, a fourth division ("M") and fifth division Africa were forming.
Mussolini also pushed through plans to raise 142 MVSN combat battalions of 650 men each to provide a Gruppo di Assalto to each army division. These Gruppi consisted of two cohorts (each of three centuriae of three manipoli of two squadre each) plus Gruppo Supporto company of two heavy machine gun manipoli (with three HMG each) and two 81 mm mortar manipoli (with three Mortars each).
Later 41 Mobile groups were raised to become the third regiment in Italian Army divisions as it was determined through operational experience that the Italian army's binary divisions were too small in both manpower and heavy equipment. These mobile groups suffered heavy casualties due to being undermanned, under equipped and under trained. 
Late in the war Mussolini decided to create 22 highly trained combat battalions called M Battalions. These battalions were given the designation M alongside their names in the Army OOB to indicate their status; that they had received specialist assault and combat training, or had proven themselves in combat and had received a battlefield promotion to this status. By the end of the Fascist regime only 11 battalions had been fully formed.
The MVSN fought in every theater where Italy did.

Appearance

The Blackshirts wore the same uniform as the Italian army with the addition of a black shirt and tie and a black fez. The uniform jacket had black flames with two ends on the collar in place of the insignia and the lictor bundles instead of the army's stars . There was an all-black dress uniform worn by some officers and the Moschettieri del Duce ("The Leader's Musketeers", Mussolini's Guard).

Ranks

Mussolini as Comandante Generale was made Primo Caporale Onorario (First Honorary Corporal) in 1935 and Adolf Hitler was made Caporale Onorario (Honorary Corporal) in 1937. All other ranks closely approximated those of the old Roman army as follows.

Legacy

The ethos and sometimes the uniform were later copied by others who shared Mussolini's political ideas, including Adolf Hitler in Nazi Germany, who issued brown shirts to the "Storm Troops" (Sturmabteilung) and black uniforms to the "Defense Squad" (Schutzstaffel, also colloquially known as "Brownshirts", because they wore black suit-like tunics with brown shirts), Sir Oswald Mosley in the United Kingdom (whose British Union of Fascists were also known as the "Blackshirts"), the Warriors for the Advancement of the Bulgarian National Spirit who wore red shirts,  William Dudley Pelley in the United States (Silver Legion of America or "Silver Shirts"),  in Mexico the Camisas Doradas or "Golden Shirts",  Plínio Salgado in Brazil (whose followers wore green shirts), and Eoin O'Duffy in the Irish Free State (Army Comrades Association or "Blueshirts"). "Blueshirts" can also refer to Canadian fascists belonging to the Canadian National Socialist Unity Party and to the members of Falange Española, the most influential party within Franco's dictatorship in Spain. The paramilitary fascist Iron Guard members in Romania and the fascist Yugoslav Radical Union wore green shirts.
After the Armistice of Cassibile was signed, the Blackshirts were dissolved; in the pro-fascist Italian Social Republic they were replaced by the National Republican Guard and the Black Brigades in the militia role, alongside the Republican Police Corps.