Gettysburg, Third Day, Position of Troops.
This map by Union mapmaker Robert Knox Sneden shows the positions of Union and Confederate forces on July 3, 1863, at the Battle of Gettysburg, during the American Civil War (1861–1865). Sneden uses arrows, colors, and degrees of shading to show the movement of divisions during the day. Notably, the map captures the attempted frontal assault by Confederate soldiers under the command of George E. Pickett on the Union positions atop Cemetery Ridge. The advance, known now as "Pickett's Charge," was the centerpiece of Confederate general Robert E. Lee's attempt to break the center of the Union line; its failure cemented Confederate defeat at Gettysburg and ensured Lee's retreat to Virginia.