Question: When was the King of Prussia died under whom Friedrich Wilhelm Ernst Freiherr von Gaudi served as a Lieutenant General?
Sentence (from "Friedrich Wilhelm von Gaudi"): Friedrich Wilhelm Ernst Freiherr von Gaudi (Gaudy) (23 August 1725 in Spandau, Berlin – 13 December 1788 in Wesel) was a Prussian Lieutenant General who served Frederick the Great in the Seven Years' War.
Relevant evidence: Yes