Answer
The French Revolutionary Army, where Lazare Carnot, father of Sadi Carnot, was influential, played a pivotal role in the political and social transformation of France during the French Revolution. Lazare Carnot's contributions, particularly in organizing and leading the army, were crucial in securing victories and consolidating the Republic's power. This revolutionary period profoundly shaped France's history and politics, leaving an enduring legacy on its institutions and society.