After his return from London, Count von Waldburg took part in the Battle of Mollwitz, where he was wounded. In October 1741 he and his corps drove General Neipperg from the Neisse region to Troppau: modern historians suggest that this was more of a show, that Frederick, possibly through "Trux", had negotiated with Neipperg to leave the Neisse region. "Trux" joined the campaign in Bohemia in 1744 and was present at the Siege of Prague. On May 14 he was in action at Lesch in Moravia; he was able to repel the attack, but was again wounded in the fighting. For this he received an additional pension from King and in August of that year the King gave "Trux" the Black Eagle Order, and in January 1745 he was promoted to the rank of general. Later that year, he fell in the Battle of Hohenfriedberg (4 July 1745). He was struck by a cannonball, which killed him immediately. "Trux" died childless. His name is recorded on the Frederick's monument in Berlin.