Members of the French National Guard under the command of General Lafayette open fire on a crowd of radical Jacobins at the Champ de Mars, Paris, during the French Revolution, killing scores of people.

The National Guard is a French military, gendarmerie, and police reserve force, active in its current form since 2016 but originally founded in 1789 during the French Revolution.

Marie-Joseph Paul Yves Roch Gilbert du Motier de La Fayette, Marquis de La Fayette, known in the United States as Lafayette, was a French military officer and politician who volunteered to join the Continental Army, led by General George Washington, in the American Revolutionary War. Lafayette commanded Continental Army troops in the decisive siege of Yorktown in 1781, the Revolutionary War's final major battle, which secured American independence. After returning to France, Lafayette became a key figure in the French Revolution of 1789 and the July Revolution of 1830 and continues to be celebrated as a hero in both France and the United States.

The Champ de Mars massacre took place on 17 July 1791 in Paris at the Champ de Mars against a crowd of republican protesters amid the French Revolution. Two days before, the National Constituent Assembly issued a decree that King Louis XVI would retain his throne under a constitutional monarchy. This decision came after Louis and his family had unsuccessfully tried to flee France in the Flight to Varennes the month before. Later that day, leaders of the republicans in France rallied against this decision.

A Jacobin was a member of the Jacobin Club, a revolutionary political movement that was the most famous political club during the French Revolution (1789–1799). The club got its name from meeting at the Dominican rue Saint-Honoré Monastery of the Jacobins. The Dominicans in France were called Jacobins because their first house in Paris was the Saint Jacques Monastery.