The Civil War: Causes, Battles, and Key Figures

The Civil War was not an accident of 1861. It was the violent settlement of a question the founders had left open for four generations: whether a nation built on the proposition that all men are created equal could keep nearly four million people in bondage. When the slave states seceded rather than accept a president opposed to slavery's expansion, the argument moved from the Senate floor to the battlefield — and 750,000 Americans did not come home.

This guide works through the war in layers: the overview, the causes that made it nearly inevitable, the generals and presidents who led it, the battles that decided it, the words and orders that gave it meaning, and the uneasy peace that followed. Each links to a full account. Together they trace how a war to preserve the Union became a war to end slavery — and why its questions outlived the fighting.