Reign of Terror the terror, but the timely success of the Terror with French victories added justification to its growth and continuation. During the Reign of Terror, the sans-culottes and the Hébertists put pressure on the National Convention delegates and contributed to the overall instability of France. The National Convention was bitterly split between the Montagnards and the Girondins. The Girondins were more conservative leaders of the National Convention, while the Montagnards supported radical violence and pressures of the lower classes. Once the Montagnards gained control of the National Convention, they began demanding radical measures. Moreover, the sans-culottes, the scrappy, urban workers of
Reign of Terror tide would not turn from them until September of 1792 when the French won a critical victory at Valmy preventing the Austro-Prussian invasion. While the French military had stabilized and was producing victories by the time the Reign of Terror officially began, the pressure to succeed in this international struggle acted as justification for the government to pursue its tyrannical actions. It was not until after the execution of Louis XVI and the annexation of the Rhineland that the other monarchies began to feel threatened enough to form the First Coalition. The Coalition, consisting of Russia, Austria, Prussia, Spain, Holland,