In April 1758, he took part in the Siege of Schweidnitz with seven cuirassier regiments and then moved with Frederick's army to Moravia. In the battles of Zorndorf and Hochkirch, he again led by example. In 1759 he served in Silesia. In 1760, he fought at the head of two dragoon regiments in the Battle of Liegnitz, and commanded the post roads in Silesia in the following winter. The end of his service in this war was, for Lentulus, the Battle of Reichenbach on 16 August 1762.