gettysburg national military park, page six
After the action at Culp's Hill was finished, Lee decided to attack the center of the Union line believing it to be the weakest part of the Union forces. This assault would be remembered as Pickett's Charge.
It began with a barrage of cannon fire from the Confederate side. Immediately, Union cannons returned fire. Both sides continued to fire for two hous. It was so heavy and loud that it was heard as far away as Pittsburgh (180 miles). When the Confederate cannon fire lifted, Lee-believing that the Union line would be softened up-ordered his troops to advance.
An alternate picture of the field is available.
As the Confederate troops marched toward the Union forces, Union cannons began to fire upon them. As the Union cannon fire decimated the Confederate lines, the Confederate soldiers closed ranks and continued to march toward the Union line. Once the Confederate line reached the Emmitsburg Road, shown in the picture above, Union gunfire errupted en masse, killing many more of the oncoming soldiers. And still they continued to march towards Cemetary Ridge.
This is a picture of the area around the High Water Mark taken from the field looking east towards where the Union line was. In the foreground is a stone wall the Union forces used for cover while firing at the approaching soldiers.
The photo to the right shows the monument which markes the spot where Armistead was mortally wounded. Behind it the single tree marks a spot where the stone wall abruptly turns. Known as "the Angle", this is the spot where the Confederate Army crossed the wall and broke into the Union lines.
Desperately, Confederate forces tried to force their way forward, but Union soldiers held their ground. The Confederate soldiers, who had suffered so much and marched so far, were forced to retreat.
This is where the battle would end. Known as the "High Water Mark", it signifies the depest advance of the Confederate Army in the Civil War. Never again would Confederate forces threaten Union territory. Because of the large number of casualties inflicted upon the Army of Northern Virginia, Lee could not continue the fight. His withdrawal from Gettysburg began the next day. The Civil War would continue for another two years, during which the Confederate army was forced to fight a defensive war.