Excerpts from Books and Wikipedia
"The French constitution of 1793 is also known as the 'Montagnard Constitution,' after the 'Mountain,' the dominant and extreme Jacobin faction of the ruling French National Convention that pushed it into law." [Furtado: 1001 Days] The Jacobin Club "was the most famous and influential political club in the development of the French Revolution. Initially founded by anti-Royalist deputies from Brittany, the Club grew into a nationwide republican movement, with a membership estimated at a half million or more. The Jacobin Club was heterogeneous and included both prominent parliamentary factions of the early 1790s, the radical Mountain and the more moderate Girondists. In 1792–3, the Girondists (led by Brissot and including Thomas Paine) dominated the Jacobin Club and led the country. Believing that revolutionary France would not be accepted by its neighbours, they called for an aggressive foreign policy and forced war on Austria. The Girondists were the dominant faction when the Jacobins overthrew the monarchy and created the republic. When the Republic failed to deliver the unrealistic gains that had been expected, they lost popularity." [Wikipedia]