Headquarters of the Army of the Potomac moved from Frederick to Middleburg. The First and Eleventh Corps marched from Frederick to Emmitsburg. The Second Corps moved from Monocacy Junction by way of Liberty and Johnsville to Uniontown. The Third Corps went from near Woodsborough to Taneytown. The Fifth Corps marched from Ballinger's Creek by way of Frederick and Mount Pleasant to Liberty. The Sixth Corps moved from Hyattstown by way of New Market and Ridgeville to New Windsor. The Twelfth Corps marched from Frederick to Taneytown and Bruceville. The First and Second brigades of the First Cavalry Division moved from Middletown by way of Boonsborough, Cavetown, and Monterey Springs to near Fairfield. The reserve cavalry brigade of the First Division went from Middletown to Mechanicstown. The Second Cavalry Division moved from New Market and Ridgeville to New Windsor. The Third Cavalry Division went from Frederick to Littlestown, and the Artillery Reserve moved from Frederick to Bruceville. Skirmishes took place at Muddy Branch and Westminster, Maryland, and at McConnellsburg and near Oyster Point, Pennsylvania.