After decades of simmering tensions over slavery, states' rights, and westward expansion between northern and southern states, the American Civil War broke out in 1861. Seven southern states formed the Confederate States of America after Abraham Lincoln was elected president in 1860; four additional states soon joined them.
The Confederate surrender in 1865 brought the Civil War, commonly known as the War Between the States, to a conclusion. With over 620,000 of the 2.4 million soldiers killed, millions more hurt, and a large portion of the South in ruins, the fight was the most expensive and lethal combat ever waged on American territory.
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