The terrain at the Battle of Gettysburg significantly affected the battle's outcome by providing cover for Union troops.

The rolling hills, rocky outcrops, and wooded areas allowed Union forces to establish strong defensive positions, particularly on Cemetery Hill and Little Round Top. This advantageous high ground enabled them to effectively repel Confederate assaults. Conversely, the terrain also posed challenges for the attacking Confederate troops, who had to navigate the difficult landscape, which contributed to confusion and disorganization during critical moments of the battle, ultimately favoring the Union.