 Complete the following phrase:  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 