During the maneuvers leading to the Battle of Amberg on 24 August 1796, Nauendorf's cavalry reconnaissance discovered crucial intelligence, after which he sent Archduke Charles the message: "If your Royal Highness will or can advance 12,000 men against Jourdan's rear, he is lost." After the Austrian victory at Amberg, Nauendorf prevented General Jean-Victor Moreau's attempted Danube crossing at Neuburg and thwarted Moreau's next attempt to flank the Austrians by passing through Ulm.