The war sparked by the attack on Fort Sumter was the American Civil War, which began in April 1861. The Confederate attack on Fort Sumter, a Union fort located in Charleston, South Carolina, marked the first military confrontation of the conflict. This attack caused significant outrage in the North, leading to increased support for the Union cause. The Civil War lasted until 1865 and was primarily fought over issues surrounding slavery, states' rights, and the future of the Union. It resulted in immense losses and deep societal changes, reshaping the nation.