 These batteries served in the Peninsula Campaign, at Second Manassas, and Antietam.Walton commanded the batteries on Marye's Heights during the Battle of Fredericksburg and the Chancellorsville Campaign.He commanded the artillery reserve of the First Corps artillery and was offended when at Gettysburg a subordinate Colonel E. Porter Alexander was placed in charge of the artillery preparation for Pickett's Charge on July 3, 1863.