War of the Fourth Coalition
In 1806-7 his forces besieged Breslau, and after finally taking it he ordered the fortifications to be levelled. He was named Count of Unsebourg by Napoleon I after the Silesian campaign during the War of the Fourth Coalition. In the campaign of 1809, he led a small allied corps from Württemberg in the battles of Abensberg, Landshut, and Eckmühl.