There actually was an assassination Bureau, centered in London, steered from behind the scenes by the Monarchy, British Intelligence, and the Fabian Society. Its operational head was the exiled Russian prince, Peter Kropotkin, who fled Russia, and then Switzerland, and then suspiciously escaped from jail in Paris to find asylum in England. He was on the lam for his role in the assassination of Czar Alexander II, and as a leader of the "People's Will" anarchist organization, he was under a death sentence. He was the international head of the anarchist movement, replacing Bakunin, and steered the organization which assassinated 19 heads of state, Kings, Queens, Princes, Dukes and Archdukes, Prime ministers, and a President, during the years preceding WWI. Kropotkin was the controller of Emma Goldman (who lived with Kropotkin for a time in London) whose disciple, Czolgosz, shot McKinley. Kropotkin was with Emma Goldman when she met with Czolgosz at Jane Addams "Hull House" in Chicago in the week before Czolgosz made his way to Buffalo to shoot McKinley. King Umberto of Italy was shot the year before by Antonio Bresci, member of Goldman's anarchist chapter in Paterson NJ. Goldman met with Bresci weeks before he went to Italy to shoot the King, financed by money raised by the members of the chapter. Go through the history of the political assassinations during the run up to WWI, mostly done by anarchists, supposedly acting alone. It was all organized by British Intelligence out of London, directed by Kropotkin and his networks.
There are many allusions to the actual real story in the film, for those, who, like a previous reviewer who touched on this, actually know some history.
