With the outbreak of the Seven Years' War in 1756, he was able to take over the city of Görlitz. In 1757 he joined the army of the Duke of Bevern. He participated in the Prussian victory at the Battle of Reichenberg. At the Battle of Prague, he fought on the left wing, pursuing the enemy as far as Gąsawa. On June 18 he fought in the Battle of Kolin. He was present at the Battle of Leuthen at which his Hussars delivered a decisive blow against the Austrian flank. At the end of the year, he became seriously ill but recovered. In the beginning of 1758, he became major general and received a pension of 1,500 thaler.