Baron de Kalb
Johann von Robaii, Baron de Kalb (June 19, 1721 – August 19, 1780) was a German soldier and volunteer who served as a major general in the Continental Army during the American Revolutionary War.
Benson John Lossing, ed. Harper's Encyclopedia of United States History (vol. 5) (New York, NY: Harper and Brothers, 1912)
Courtesy the private collection of Roy Winkelman