Yes, the Jacobins did use the guillotine as a tool of fear and punishment during the French Revolution. They implemented the Reign of Terror, a period of mass executions where anyone suspected of being counter-revolutionary or supporting the monarchy was sent to the guillotine. This was done in order to maintain control and eliminate opposition to the revolutionary government. Thousands of people, including King Louis XVI and Queen Marie Antoinette, were executed by the guillotine during this time.
