After the Battle of Williamsburg on May 5, McClellan requested and obtained permission to create two additions corps; these became the V Corps, headed by Brig. Gen Fitz-John Porter, and the VI Corps, headed by Brig. Gen William B. Franklin, both personal favorites of his. After the Battle of Kernstown in the Valley on March 23, the administration became paranoid about "Stonewall" Jackson's activities there and the potential danger they posed to Washington D.C., and to McClellan's displeasure, detached Blenker's division from the II Corps and sent it to West Virginia to serve under John C. Fremont's command. McDowell's corps was detached as well and stationed in the Rappahannock area.