The Royal Prussian Army was the principal armed force of the Kingdom of Prussia during its participation in the Napoleonic Wars.
He delegated responsibility to the aged Charles William Ferdinand, Duke of Brunswick, and the army began to degrade in quality.
[1] In comparison, the revolutionary army of France, especially under Napoleon Bonaparte, was developing new methods of organization, supply, mobility, and command.
Prussia submitted to major territorial losses, a standing army of only 42,000 men, and an alliance with France in the Treaty of Tilsit (1807).
The defeat of the disorganized army shocked the Prussian establishment, which had largely felt invincible after the Frederician victories.
[6] This system granted the army a larger reserve of 30,000–150,000 extra troops[3] The Krümpersystem was also the beginning of short-term compulsory service in Prussia, as opposed to the long-term conscription previously used.
Scharnhorst promoted the integration of the infantry, cavalry, and artillery through combined arms, as opposed to their previous independent states.
[12] The army reform movement was cut short by Scharnhorst's death in 1813, and the shift to a more democratic and middle class military began to lose momentum in the face of the reactionary government.
When the cautious king refused to support a new Prussian war, however, Schill led his hussar regiment against the occupying French, expecting to provoke a national uprising.
[13] The Franco-Prussian treaty of 1812 forced Prussia to provide 20,000 troops to Napoleon's Grande Armée, first under the leadership of Grawert and then under Yorck.
As the news of the destruction of the Grande Armée spread, and the appearance of countless stragglers convinced the Prussian people of the reality of the disaster, the spirit generated by years of French domination burst out.
For the moment the king and his ministers were placed in a position of the greatest anxiety, for they knew the resources of France and the boundless versatility of their arch-enemy far too well to imagine that the end of their sufferings was yet in sight.
[15] But the Russians and the soldiers were resolved to continue the campaign, and working in collusion they put pressure on the not unwilling representatives of the civil power to facilitate the supply and equipment of such troops as were still in the field; they could not refuse food and shelter to their starving countrymen or their loyal allies, and thus by degrees the French garrisons scattered about the country either found themselves surrounded or were compelled to retire to avoid that fate.
With Prussia's joining of the Sixth Coalition out of his hands, Frederick William III quickly began to mobilize the army, and the East Prussian Landwehr was duplicated in the rest of the country.
In the same year Boyen and Grolman drafted a law for universal conscription, by which men would successively serve in the standing army, the Landwehr, and the local Landsturm until the age of 39.
In 1810 Frederick William decreed that staff officers serve with different branches so as to gain practical knowledge of soldiering.