German campaign of 1813 in the context of "Sixth Coalition"

In the War of the Sixth Coalition (French: Guerre de la Sixième Coalition; December 1812 – May 1814), sometimes known in Germany as the Wars of Liberation (German: Befreiungskriege), a coalition of Austria, Prussia, Russia, Spain, the United Kingdom, Portugal, Sweden, Sardinia, and a number of German States defeated France and drove Napoleon into exile on Elba. After the disastrous French invasion of Russia of 1812 in which they had been forced to support France, Prussia and Austria joined Russia, the United Kingdom, Sweden, and Portugal, and the rebels in Spain who were already at war with France. The invasion of Russia cost the French many seasoned soldiers, so Napoleon took action to engage "Marie-Louises", young conscripts who were barely familiar with military affairs; they were called up from October 1813 to 1815. However, the constant warfare weakened the Coalition nations as well. The Russian military was particularly depleted after 1812, and Prussia also suffered a significant downgrade as a result of its losses in 1806–1807; nevertheless, it carried out large-scale reforms to improve the situation in the Prussian Army. Later, having encountered the Prussians in the Battle of Lützen, Napoleon would say: "These animals have learned something."

The War of the Sixth Coalition saw battles at Lützen, Bautzen, and Dresden. The even larger Battle of Leipzig (also known as the Battle of Nations) was the largest battle in European history before World War I. Ultimately, Napoleon's earlier setbacks in Spain, Portugal and Russia proved to be the seeds of his undoing. With their armies reorganized, the allies drove Napoleon out of Germany in 1813 and invaded France in 1814. The Allies defeated the remaining French armies, occupied Paris, and forced Napoleon to abdicate and go into exile. The French monarchy was revived by the allies, who handed rule to the heir of the House of Bourbon in the Bourbon Restoration.

Frederick William III (German: Friedrich Wilhelm III.; 3 August 1770 – 7 June 1840) was King of Prussia from 16 November 1797 until his death in 1840. He was concurrently Elector of Brandenburg in the Holy Roman Empire until 6 August 1806, when the empire was dissolved.

Frederick William III ruled Prussia during the times of the Napoleonic Wars. The king reluctantly joined the Sixth Coalition against Napoleon in the German campaign of 1813. Following Napoleon's defeat, he took part in the Congress of Vienna, which assembled to settle the political questions arising from the new, post-Napoleonic order in Europe. His primary interests were internal – the reform of Prussia's Protestant churches. He was determined to unify the Protestant churches to homogenize their liturgy, organization, and architecture. The long-term goal was to have fully centralized royal control of all the Protestant churches in the Prussian Union of Churches.

The Battle of Leipzig, also known as the Battle of the Nations, was fought from 16 to 19 October 1813 at Leipzig, Saxony. The Coalition armies of Austria, Prussia, Sweden, and Russia, led by Tsar Alexander I, Karl von Schwarzenberg, and Gebhard von Blücher, decisively defeated the Grande Armée of French Emperor Napoleon Bonaparte. Napoleon's army also contained Polish and Italian troops, as well as Germans from the Confederation of the Rhine (mainly Saxony and Württemberg). The battle was the culmination of the German campaign of 1813 and involved about 560,000 soldiers, 2,200 artillery pieces, the expenditure of 400,000 rounds of artillery ammunition, and 133,000 casualties, making it the largest battle of the Napoleonic Wars, and the largest battle in Europe prior to World War I.

Decisively defeated, Napoleon was compelled to return to France while the Sixth Coalition kept up its momentum, dissolving the Confederation of the Rhine and invading France early the next year. Napoleon was forced to abdicate and was exiled to Elba in May 1814.