 Complete the following phrase:  Wright began constructing fortifications around Washington, D.C., before being assigned to the 3rd Division of the Department of Northeast Virginia under Maj. Gen. Samuel P. Heintzelman. Serving as Chief Engineer of the 3rd Division during the First Battle of Bull Run on July 21, 1861, Wright was promoted to major in August. Promoted to brigadier general of volunteers the following month, Wright was assigned as Chief Engineer to Maj. Gen. Thomas W. Shermans November 1861 expedition against 