Twenty years have passed since that event; it is almost too new in history to make a great impression, but the time will come when it will loom up as one of the greatest of man's achievements, and the name of Abraham Lincoln — who of his own will struck the shackles from the limbs of four millions of people — will be honored thousands of years from now as man's name was never honored before.

The American Civil War (ACW), also known as the War of the Rebellion, the Great Rebellion, and several other names, was a civil war that was fought in the United States of America from 1861 to 1865. Fearing that the future of slavery was in jeopardy after the election of an anti-slavery U.S. president, eleven slave-holding U.S. states located in the southern United States declared their secession from the country and formed the Confederate States, also known as "the Confederacy", sparking war. Led by Democrat Jefferson Davis, they fought against the United States, also known as "the Union", led by Republican Abraham Lincoln, which consisted of every free U.S. state as well as five slave-holding states, known as "border states". In 1865, after four years of warfare, the Confederacy surrendered, and slavery was abolished in the United States with the ratification of the Thirteenth Amendment to the United States Constitution by three-fourths of the states.