War of the Sixth Coalition: France engages Russia and Prussia in the Battle of Brienne.

In the War of the Sixth Coalition, sometimes known in Germany as the Wars of Liberation, 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", a young conscrips who were barely familiar with military affairs; they were called up from October 1813 to 1815.

Prussia was a German state centred on the North European Plain that originated from the 1525 secularization of the Prussian part of the State of the Teutonic Order. For centuries, the House of Hohenzollern ruled Prussia, expanding its size with the Prussian Army. Prussia, with its capital at Königsberg and then, when it became the Kingdom of Prussia in 1701, Berlin, decisively shaped the history of Germany. Prussia formed the German Empire when it united the German states in 1871. It was de facto dissolved by an emergency decree transferring powers of the Prussian government to German Chancellor Franz von Papen in 1932 and de jure by an Allied decree in 1947.

The Battle of Brienne saw an Imperial French army led by Emperor Napoleon attack Prussian and Russian forces commanded by Prussian Field Marshal Gebhard Leberecht von Blücher. After heavy fighting that went on into the night, the French seized a château, nearly capturing Blücher. However, the French were unable to dislodge the Russians from the town of Brienne-le-Château. Napoleon himself, making his first appearance on a battlefield in 1814, was also nearly captured. Very early the next morning, Blücher's troops quietly abandoned the town and retreated to the south, conceding the field to the French.