Which revolutionary group did Robespierre belong to during the French Revolution?

Robespierre was a prominent member of the Jacobin Club, which played a significant role during the French Revolution. The Jacobins were known for their radical ideas and advocacy for a republic. They focused on the principles of liberty, equality, and fraternity, often aligning with the more extreme elements of the revolution, especially during the Reign of Terror, when Robespierre was a key leader.

The Jacobins wielded considerable influence in the National Convention and were instrumental in the push for more radical reforms. Robespierre's vision involved a government deeply rooted in civic virtue and public morality, which influenced many of the policies implemented during the revolution.

While the Girondins and the Montagnards also participated in the revolution, the Girondins were more moderate and were often in conflict with the Jacobins. The Montagnards were considered a faction within the Jacobins, representing the more radical wing but did not encompass the entirety of Robespierre's membership. The Sans-culottes were working-class militants who supported the revolution, but they were not a formal political group like the Jacobins. This background underscores why the Jacobin Club is identified as the revolutionary group Robespierre specifically belonged to during this transformative period.