The Civil War, a pivotal conflict in American history, tore the nation apart from 1861 to 1865. Rooted in deep-seated tensions over slavery, states' rights, and economic differences, the war pitted the Union against the Confederacy in a struggle that would reshape the country. The conflict saw major battles like Gettysburg and Vicksburg, and introduced influential figures such as Abraham Lincoln and Robert E. Lee. It ended slavery, transformed the economy, and left a lasting impact on American society and politics that continues to resonate today.