The correct option is C
The Prussian army has its origin in the small number of mercenaries of Brandenburg who participated in the Thirty Years War. Frederick William I of Brandenburg forms a permanent army for the first time, while Frederick William of Prussia drastically increased its size. King Frederick II the Great led the Prussian troops to victory in the Silesian Wars increasing their prestige.
The Prussian army was widely defeated by France in the Napoleonic wars of the fourth Coalition. However, under the leadership of Gerhard von Scharnhorst, the Prussian reformers modernized the army, which participated in the War of the Sixth Coalition. Although the Conservatives stopped some of the reforms, the army later became a bulwark of the Prussian government
