The battle of Valmy, also called the battle or affair of the camp of the Moon, is the first decisive victory of the French army during the wars of the Revolution which followed the overthrow of the Bourbon monarchy. It took place on September 20, 1792, when a Prussian army commanded by the Duke of Brunswick attempted to march on Paris. Generals François-Christophe Kellermann and Charles-François Dumouriez managed to stop the Prussian advance near the village of Valmy located east of Paris in Champagne-Ardenne.