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 moved from Ballinger's Creek by way of Frederick and Mount Pleasant to Liberty. The Sixth Corps marched from Hyattstown by way of New Market and Ridgeville to New Windsor. The Twelfth Corps moved from Frederick to Taneytown and Bruceville. The First and Second Brigades of the First Cavalry Division went from Middletown by way of Boonsvorough, Cavetown, and Monterey Springs to near Fairfield. The Reserve Cavalry Brigade of the First Division moved from Middletown to Mechanicstown. The Second Cavalry Division went from New Market and Ridgeville to New Windsor. The Third Cavalry Division moved from Frederick to Littlestown, and the Artillery Reserve went from Frederick to Bruceville. Skirmishes took place at Muddy Branch and Westminster, Maryland, and at McConnellsburg and near Oyster Point, Pennsylvania.