The Champ de Mars Massacre was an incident that took place on 17 July 1791, when soldiers of the National Guard under the Marquis de Lafayette opened fire on a crowd of demonstrators, who were calling for a referendum on the king's abdication and the establishment of a republic. It was a major turning point in the French Revolution (1789-99).
This is a companion discussion topic for the original content at https://www.worldhistory.org/Champ_de_Mars_Massacre/.