In response to this threat, Jackson chose to go on the offensive, attacking Pope's vanguard under Banks, before the entire Army of Virginia could be brought to bear on his position at Gordonsville. After defeating Banks, he then hoped to move on Culpeper Court House, north of Gordonsville and the focal point of the Union arc about Northern Virginia, to keep Pope's army from uniting. This would allow Jackson to fight and hopefully defeat each of the Union Corps separately, as he had done during the Valley Campaign. Accordingly, Jackson set out on August 7 for Culpeper. The cavalry under Brig. Gen. Beverly Robertson was sent ahead to dispatch the Federal cavalry guarding the fords of the Rapidan River and occupying Madison Court House, threatening the Confederates left flank as they marched northward. This task was easily accomplished by Robertson on August 8.