Answer
In the Battle of Eckmühl, fought on April 21-22, 1809, Marshal Louis Davout led his corps with exceptional skill and bravery. His decisive victory over the Austrian army secured Napoleon's triumph in the campaign, earning him the title of Prince of Eckmühl. Davout's strategic maneuvering and fierce combat leadership played a pivotal role in breaking the Austrian defenses and achieving a resounding French victory.