In a speech given on this day in 1925 in the Chamber of Deputies (Camera dei deputat, the lower house of the bicameral Italian parliament), which history sources as the start of his fascist dictatorship, Benito Mussolini took full responsibility for the actions of the paramilitary wing of the party, the Blackshirts—Milizia Volontaria per la Sicurezza Nazionale—and challenged his political opponents to try to remove him from office, promising to restore order within forty-eight hours. Originally a loose organisation of disaffected veterans of World War I who employed violence as an intimidation tactic against reformers, progressives and Socialists, membership had grown to over two-hundred thousand by the March on Rome in late October 1922, swearing their allegiance to Commandant-General il Duce. The murder of a Socialist deputy, Giacomo Matteotti, who criticised the 1924 election due to voting irregularities which solidified Mussolini’s control of government, prompted a cover-up pinning the assassination on Matteotti’s own party. Whilst much of the opposition boycotted sessions, hoping to force King Victor Emmanuel to dissolve parliament, the Blackshirts presented Mussolini with the ultimatum to crush their enemies or they would do so without him. Fearing a revolt by the militia, Mussolini dropped all pretence of democracy, dismantling all constitutional and normative checks on power and declaring himself the only competent authority to set the legislative agenda.