"I Corps,Army of the Potomac" . "Army of Northeastern Virginia" . . . "Department of the West" . "Irvin McDowell (October 15, 1818 \u2013 May 4, 1885) was a career American army officer. He is best known for his defeat in the First Battle of Bull Run, the first large-scale battle of the American Civil War."@en . "1818-10-15Z"^^ . . . . . "Irvin McDowell"@en . . . "1885-05-04Z"^^ . . . . "1838Z"^^ . . "III Corps,Army of Virginia" . "1885Z"^^ . "McDowell, Irvin"@en . "Union" . . "Department of the Pacific" . . "1818Z"^^ . . "Department of California" . . "1838Z"^^ . "UnionArmygeneral" . "United States of America" .