War broke out between Prussia and France again in 1813 and Blücher returned to active service at the age of 71. He was appointed full general over the Prussian field forces and clashed with Napoleon at the Battles of Lützen and Bautzen. Later he won a critical victory over the French at the Battle of Katzbach. Blücher commanded the Prussian Army of Silesia at the Battle of the Nations where Napoleon was decisively defeated. For his role, Blücher was made a field marshal and received his title of Prince of Wahlstatt. After Napoleon’s return in 1815, Blücher took command of the Prussian Army of the Lower Rhine and coordinated his force with that of the British and Allied forces under the Duke of Wellington. At the Battle of Ligny, he was severely injured and the Prussians retreated. After recovering, Blücher resumed command and joined Wellington at the Battle of Waterloo, with the intervention of Blücher's army playing a decisive role in the final allied victory.