- It was the bloodiest battle ever fought in North America with an estimated 51,000 casualties.
- The Union victory at Gettysburg boosted the morale of the Northern troops and convinced many European countries not to recognize the Confederacy, thus preventing the South from gaining much-needed support from abroad.
- Furthermore, the battle marked a turning point in the war as it ended Confederate General Robert E. Lee's second invasion of the North and shifted the momentum in favor of the Union.