Question: The Big Sandy Expedition was organized by a Union general who was also a United States what?
Sentence (from "Big Sandy Expedition"): The Big Sandy Expedition was an early campaign of the American Civil War in Kentucky that began in mid-September 1861 when Union Brig. Gen. William "Bull" Nelson received orders to organize a new brigade at Maysville, Kentucky and conduct an expedition into the Big Sandy Valley region of Eastern Kentucky and stop the build-up of Confederate forces under Col. John S. Williams.
Relevant evidence: Yes