circa 1920: Crown Prince Frederick William (1882 - 1951), the last crown prince of Germany and eldest son of Wilhelm II. During WW I he commanded armies on the western front. In 1918 he retired to private life. (Photo by Hulton Archive/Getty Images)
circa 1920: Crown Prince Frederick William (1882 - 1951), the last crown prince of Germany and eldest son of Wilhelm II. During WW I he commanded armies on the western front. In 1918 he retired to private life. (Photo by Hulton Archive/Getty Images)