During which war did the Battle of Gettysburg take place?

The Battle of Gettysburg took place during the American Civil War, which occurred from 1861 to 1865. This battle, fought from July 1 to July 3, 1863, is one of the most significant engagements in the conflict and is often considered a turning point in the war. It was marked by intense fighting between the Union and Confederate forces and resulted in a significant victory for the Union. The battle is notable not only for its scale and impact on the war's outcome but also for President Abraham Lincoln's Gettysburg Address, which emphasized the principles of human equality and the importance of preserving the Union.

The other options are associated with different historical contexts: World War I took place from 1914 to 1918, World War II lasted from 1939 to 1945, and the Peloponnesian War occurred in ancient Greece from 431 to 404 BCE. None of these conflicts are related to the American Civil War or the specific events of the Battle of Gettysburg, solidifying why the correct answer pertains specifically to the Civil War.