Dorsey Pender's promising career ended at the Battle of Gettysburg. On July 1, 1863, his division moved in support of Maj. Gen. Henry Heth's division down the Chambersburg Pike towards Gettysburg. Heth encountered stronger resistance from the Union I Corps than he expected and was repulsed in his first assault. Uncharacteristically for the normally aggressive Pender, he did not immediately charge in to assist Heth, but took up positions on Herr Ridge and awaited developments. In Heth's second assault of the day, Hill ordered Pender to support Heth, but Heth declined the assistance and Pender once again kept his division in the rear. For the second time in the day, Heth got more than he bargained for in his assault on McPherson's Ridge. He was wounded in action and could not request the assistance from Pender he had earlier refused. Hill ordered Pender to attack the new Union position on Seminary Ridge at about 4 p.m. The 30-minute assault by three of his brigades was very bloody and the brigade of Brig. Gen. Alfred M. Scales was almost completely destroyed by Union artillery canister fire. In the end, Pender's men forced the Union troops back in and through Gettysburg.