What strategies and tactics do you think were most important on the Union and the Confederate sides at Gettysburg? What was unique about this battle?

The Union originally wanted to reunite the country, but after the Emancipation Proclamation of 1863, the Union goal changed to include the abolition of slavery. The Confederacy had the same goal throughout the war: to incorporate all slave states and secede from the Union, survive, and defend its territory

your answer would be just capitalism.