The main defensive position of the Union Army during the Battle of Gettysburg was Cemetery Hill.

This raised landscape offered a strategic advantage for Union forces, enabling them to successfully fend off Confederate assaults. Located at the southern perimeter of Gettysburg, Cemetery Hill was a vital stronghold for the Union line. Its defenses played a crucial role in thwarting attacks, especially on July 2 and 3. The location also allowed Union artillery to control the surrounding regions, greatly enhancing the Union Army's overall success in the battle.