seeded states are now free. confederates respond saying, okay, fine, if we see black men carrying weapons against us, we will consider that the north s slave rebellion. that moment it becomes a war to abolish slavery. and there occurs the greatest battle of the war at getties berg on july 1st, 2nd and 3 in 1963. pennsylvania is as far as the north confederate army has ever gotten. if the union lost here, it cleared the way for lee to continue marching into new york. they could cutoff the northern states and new england from the mississippi river which would have been a huge disaster. the stakes were extremely high. a first day attack by the con federal army sends the union army fleeing through town and then up into the heights. and then robert lee leads a massive charge against the open field. he gets charged with union artillery raining down on the con federal side. so it was really a slaughter house. three days of fighting, three days of horrific casualties in