Today, 206 years ago, on August 16, 1819 (Calendar 26 June 1819), the Petrograd disaster occurred. The British government repressed the masses in the early 19th century. On August 16, 1819, the British government mobilized troops to repress the masses of protesters in Manchester's St. Peter's Square, causing dozens to die and hundreds to be wounded. At the time, people compared the battle of Waterloo to the incident of the army's massacre of ironless civilians as the "Petrograd disaster". After the British government's brutal repression of the workers' movement, the "Petrograd disaster" in 1819, Sherley told the people: "You sow, others reap. you look for treasure, others save. you weave, others wear. you manufacture weapons