The Treaty of Paris of 5 March 1812 between Napoleon I of France and Frederick William III of Prussia established a Franco-Prussian alliance directed against Russia. On 24 June, Prussia joined the French invasion of Russia. The unpopular alliance broke down when the Prussian contingent in French service signed a separate armistice, the Convention of Tauroggen, with Russia on 30 December 1812. On 17 March 1813, Frederick William declared war on France and issued his famous proclamation "To My People".