Question: The Battle of Cedar Mountain, also known as Slaughter's Mountain or Cedar Run, took place on August 9, 1862, in Culpeper County, Virginia, as part of the American Civil War, Union forces under which Maj. Gen., that was an American politician from Massachusetts and a Union general during the Civil War, attacked Confederate forces under Maj. Gen. Thomas J. "Stonewall" Jackson near Cedar Mountain?
Sentence (from "Cedar Mountain, Virginia"): The 800 ft ridge is 7 mi south of the town of Culpeper and just to the northwest of the northern tip of the Southwest Mountains at Clark Mountain.
Relevant evidence: No