Although held in reserve with the rest of the Union cavalry for the winter of 1862 and during the Battle of Fredericksburg, Myles Keogh and O'Keeffe served Buford with obedience and gallantry during the Stoneman Raid in April 1863 and the enormous battle on 9 June at Brandy Station, which was practically all cavalry. Buford's 1st Division of cavalry fought with distinction in June 1863 as they skirmished with their much vaunted Confederate foe, led by J.E.B. Stuart in Loudoun County, Virginia – most notably at Upperville.