Complex sentence: The Battle of Valmy, the first major victory by the army of France during the Revolutionary Wars that followed the French Revolution of 1789, took place on 20 September 1792 as Prussian troops commanded by the Duke of Brunswick attempted to march on Paris.
Split into simpler sentences: The Battle of Valmy was the first major victory by the army of France during the Revolutionary Wars that followed the French Revolution. The action took place on 20 September 1792 as Prussian troops commanded by the Duke of Brunswick attempted to march on Paris.