Question

how did Gettysburg address and emancipation proclamation help in bringing about a change in American mindset

Answer 1

One hundred fifty years ago, amid lingering northern doubts about whether the Civil War was worth the cost, President Abraham Lincoln traveled to Gettysburg to dedicate a cemetery. Some months before, Union forces had repelled a Confederate incursion into Pennsylvania at the tiny crossroads town, forcing the Rebel invaders to retreat. But the three-day battle had been costly for both sides, and despite the Union victory, war pessimism hung over the North.