Napoleon not only cemented his control of Central Europe but also had Russia and the truncated Prussia ally with him against his two remaining enemies, the United Kingdom and Sweden, triggering the Anglo-Russian and Finnish War. Tilsit also freed French forces for the Peninsular War. Central Europe became a battlefield again in 1809 when Austria and the UK engaged France in the War of the Fifth Coalition. Following the end of the Napoleonic Wars in 1815, the Congress of Vienna would restore many Prussian territories.