Lee invaded the North once more in July 1863, this time engaging federal soldiers in combat in Pennsylvania at the Battle of Gettysburg.
During the American Civil War, on July 1–3, 1863, Union and Confederate soldiers engaged in combat in and around the Pennsylvanian town of Gettysburg.
Gettysburg is the biggest fight that has ever taken place in North America, with nearly 165,000 soldiers taking part.
Being on the strategic offense in Northern territory rather than the strategic defense on Southern terrain made Gettysburg unique for Lee.
Lee suffered a humiliating loss at Gettysburg, and his army never recovered.
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