The correct answer is Gettysburg
Explanation: The battle of Gettysburg was the bloodiest of the United States Civil War. In addition to more than 8,000 deaths, the Pennsylvania hill strike is considered a turning point in the US civil conflict (1861-1865).
The episode marks the beginning of the offensive of the Union's northern troops: a decisive victory for General George Meade - and a disastrous feat for the prominent Strategic General Robert Lee, military leader of the Confederacy (South).