After defeat at Bristoe Station and an aborted advance on Centreville, Stuart's cavalry shielded the withdrawal of Lee's army from the vicinity of Manassas Junction. Union cavalry under general Judson Kilpatrick pursued Stuart's cavalry along the Warrenton Turnpike. But they were lured into an ambush near Chestnut Hill and were routed. The Federal troopers were scattered and chased five miles (8 km) in an affair that came to be known as the "Buckland Races".