Horse Artillery at Mt. Defiance

On the early morning of June 19, 1862, two Confederate Virginia batteries under William Morrell McGregor and Marcellus N. Moorman of J.E.B. Stuart’s Horse Artillery were rapidly put into position on Mt. Defiance facing east toward Middleburg. Known for mobility and rapid deployment, the horse artillery used cannon including 12-pound Napoleons and 3-inch iron rifles, with batteries typically fielding four to six guns or deploying in two-gun sections. From this ridge, guns were positioned to the south and north, including a 3-inch rifle on the turnpike beside the blacksmith’s shop. The lighter 3-inch rifle offered greater accuracy and faster movement, while both types had an effective range of about one mile and could fire solid shot, exploding shell, shrapnel, and canister. These guns became a significant problem for attacking Federal cavalry on June 19 as mounted and dismounted troopers crossed largely open ground against ridgetop artillery. A gun from McGregor’s Battery placed behind the rise of the turnpike proved particularly devastating. When William Fuller’s Battery C, 3rd U.S. artillery, set up on the ridge at the west end of Middleburg opposite Mt. Defiance, the Confederate position came under fire, as shown by exploded shell remnants found there. Later, repeated Federal charges along the turnpike forced the two batteries to limber their guns and gallop west to a safer ridge, demonstrating the role horse artillery was expected to play. By June 1863, Union General Pleasonton’s cavalry also had specially trained horse artillerymen equipped with 3-inch ordnance rifles, and the Battle of Middleburg showed how both armies were developing more modern, mobile, and effective artillery coordination with cavalry.

Virginia · United States