Question: What Army Group was under the command of Wilhelm, German Crown Prince?
Sentence (from "Wilhelm, German Crown Prince"): Wilhelm, German Crown Prince (German: "Kronprinz Wilhelm von Preußen" ; 6 May 1882 – 20 July 1951) , full name Friedrich Wilhelm Victor August Ernst, was the eldest child of the future German Emperor Wilhelm II and his wife Empress Augusta Victoria, and the last Crown Prince of the German Empire and the Kingdom of Prussia.
Relevant evidence: Yes