Campagne d'Allemagne
After the devastating defeat of Napoleon's "Grande Armée" in the Russian campaign of 1812, Johann Yorck – the general in command of the "Grande Armée"'s German auxiliaries ("") – declared a ceasefire with the Russians on 30 December 1812 via the Convention of Tauroggen. This was the decisive factor in the outbreak of the German campaign the following year.