1. The Union victory at Gettysburg marked a major turning point in the war and was a significant morale boost for the North.
2. The heavy casualties incurred by the Confederate army at Gettysburg, coupled with their inability to achieve a decisive victory, weakened their military strength and marked the beginning of their decline.
3. The Battle of Gettysburg stopped General Robert E. Lee's second invasion of the North and caused him to retreat back to Virginia, effectively ending the Confederacy's attempt to invade the North and prolong the war.